For me, I plan on making it so that I have enough loyal readers/subscribers to space it out to once a week. Can't have them leaving right away. Maybe even give them a heads up, or if you're feeling daring just go ahead with that idea.
I've been looking around the fresh novels etc. wondering why most of their readers end up going from 1k to 20 or so, and most of it stems from sudden update changes. If they're used to a certain thing, they'll be more resistant to change.
If it were me and I didn't tell them about my plans, I would go from three chapter updates a week, to two, and then go to one. To get them used to the changes, and so on and so forth.
If they truly like your story, theres no need to worry about chapter updates. It means they enjoy it enough to wait, but you should also consider the length of your stories. If the amount you've written isn't enough for the wait, I suggest you upload at least two chapters.