Depends on the day, sometimes nothing, other days 20 pages of my comic, my sis, however, she is a real artist, makes expositions and stuff, great talent, she says that one should draw everyday to not lose technique and improve, im just a lvl 1 amateur and she is a lvl 50 artist boss, thats how art works.
Give or take. I draw every six months. One time last year, my best friend said, "that for one to be great, one must draw everyday to improve." I took his advice to heart that I drew everyday for a year. At the end of the year, I stopped cold turkey. Now it's very rare that I do draw.
Drawing itself has less to do with improving than studying. Even if you only drew 30 minutes a day, but you spend that 30 minutes doing some in depth studies and assessing your weak points and improving conscientiously, you're going to go way farther than someone who spends hours a day doodling mindlessly.
Not to say that drawing in itself doesn't help someone improve, but quality practice can replace quantity if you're smart about it!
As for myself I fluctuate a ton, maybe 10 hours one day and 0 another, and I too have that voice in the back of my mind that's telling me any moment I don't spend drawing is wasted. But at the same time, remember that you shouldn't feel pressured to draw, it's fine to push yourself so long as you're still enjoying yourself!
I maybe draw at least one thing 5 days a week. But mostly because I have to in order to keep up with comic updates, Patreon rewards, or other obligations to other people. It's not like it's for my own personal enjoyment.
I actually rarely draw anything for myself nowadays. Sometimes I'll get struck with inspo and push out a fanart piece though.
The time that I draw daily varies. Sometimes I draw for three hours and other times I don't draw at all. There are a few reasons why I don't draw sometimes. One reason is rest, another is other hobbies, but the main reason is that I don't want to draw sometimes unless I'm trying to improve. Here's an example of what I mean. I will spend three hours somedays just studying art to find ways to improve my art work. Once I find one tip that can help me, I'll start back to drawing until I feel like I need to study some more.
I try to pencil an entire page during the week when I'm working, so during the weekend all that's left is to add inks and tones during the weekend. I try to squeeze in at least an hour and a half every day for drawing.
I try to draw everyday but most of the time I usually end up doing small sketches which I feel that isn't enough for a decent portfolio. I mean I should try to do at least 1-3 finish digital drawings OR 3-5 comic strips at week but I never seem to do it..
Personally, I do about 15 minutes 5 days a week, but it's mostly comic work. I don't free sketch as much as I used to :<
I think what's more important than how much you draw, is how mindful you are. If you're doing the same ol' drawings as always, you can improve speed, but your repertoire of skills will not grow.
When you do your 10 minutes a day, try to incorporate something you find challenging, do a color study, things like that. It will help you improve and you don't have to burn out your creativity 
Probably too much. But I guess there's a difference between just doodling to relax yourself and working towards something specific. I'll sketch in my notebook whenever I have to chance to, but I only end up doing painting and comic work on certain days because that takes up the most time and effort.
I do it full time for a living so it varies but its always a lot. I usually work from 7am to 8pm sometimes 10pm. But I always take weekends off no matter what. I’m also at the point where I don’t really HAVE to work as much as I do but I like to.
I will say if its something you’re interested in pursuing full time there's definitely some amount of sacrifice that has to be made. Its very hard in the beginning but developing a habit of drawing even if you’re not in the mood to is KEY. Its just like any other job; you still have to get up and do it when you’re not feeling up to it. I don’t think thats as destructive as a lot of people think; it’s just like going to school or work everyday.
That said, if its just a hobby you enjoy doing, then it doesn’t have to be so strict. You’re allowed to only draw when you wanna draw. I do think habitual drawing is extremely useful for improvement but if you think its going to suck the fun out of this hobby you enjoy then don’t do it!
I'm eternally envious of those who actually can draw for multiple hours a day, even more so because it's not lack of time or health problems that are stopping me - I don't know why I can't. An hour a day is what I consider plenty... and there are days where I can't force myself to do more than a small doodle.
Although, I very much agree with those who said it's also quality of your practice that matters and not just quantity.
I 100% can relate to what you said.
I can't draw for more than one hour a day, i already feel satisfied with it. And i feel guilty when i hear people saying that they sketch for more hours a day, kinda makes me feel like i'm less passionate about drawing than them...not their fault of course.
8-10 hours a day on average? Then again I'm doing it full-time with a part-time job of 1.5-2 hours a day walking mail.
Maybe its offtopic, but I feel the same about high math... I like it and want to continue doing it during my life and even try to reach PhD in it, but currently my brain can't handle more than 1-2 hours per day of it. And sometimes I can't do math at all. Even in my best days it was like 3-4 hours per day. When I was forced to do it more (preparing to complicated exam, for example), it usually was unbearable hard, and I've quickly come to severe nervous exhaustion.
I have no idea how some of my acquaintances can do math during all day and don't have their heads exploded. 
It hurts to think that maybe my brain is less adapted to such a things than theirs 
Well, 10 minutes for a daily sketch is an improvement! Just because it is hard to draw everyday, first of all. If you think your progress is good, it's totally alright to continue as you are.
For me it varies, sometimes it's 1 hour, sometimes it's 6. Usually it's 3-4 hours or so. Drawing comic is hard for me, so I have all my time divided into 30 minute intervals to track the real time. Because sometimes you think you draw all day long, buuut in fact it's just 4 hours. Which is not cool.
But I have no idea how people can actually draw for 10 or more hours straight, come on, how come your butt and hand does not hurt 
It definitely varies for me... I work full time Monday to Friday, but I try and do prep work on my panels during my lunch break (which is usually for about 15 minutes once I'm finished eating), and during the evenings I can spend anywhere from 1-4 hrs on panels depending on what time I get home/ what I have to do that evening.
I usually take Fridays off to just chill and game when I get home - and then the weekends are a bit of a wild card. Probably add a minimum of 4-6 hours (I really wish I was more productive art wise on the weekends... but I'm usually so burnt out from the week that I end up taking it easy and so the cycle repeats it self...)
I draw 8 hours a day five days a week. However I'm a fulltime artist so this is hardly the norm. Id say before I started working I drew at least once a day though, usually only 30 minutes of drawing an anime boy in my notebook or something... but sometimes id go hard and draw 12 hours a day for like a week straight when I got really inspired and was on break, lol
I try to get at least one hour of digital art done per day, six days per week. On a free day I often get at least three to five hours done.
