Personally, I prefer quality over frequency, but I can also see why people who prioritize frequency are popular.
If you make good stuff, regardless of how often you update, you'll find you'll gain some serious fans - case in point, Dresden Codak. Before 2015, when the creator got hit his Patreon-milestone that ensured a new update every few weeks, it could be MONTHS betweent updates. Like, half a year, sometimes. And yet he had a bunch of fans, because when he DID update, the updates were amazing.
But there's a certain amount of luck involved in that equation working out. If you want to ensure that people remember your comic and stick around to read it, you need to remind them you're there. And the more frequently you do that, the more likely they are to go "Oh, right! I should read this!". Also, on Tapastic, frequent updates means a higher chance of snagging new readers because you show up in the Fresh-category.
I'd say a balance of the two - quality and frequency - is a good way to go. Figure out how much time it takes you to produce something you're satisfied with, and then pick an update schedule that takes that production-time into account.