Right now I post one page of my comic Banquet per week on Sundays, one page of my other comic Bird Boy on Thursdays. I draw two Bird Boy pages a week in order to get it finished in time for my publisher, along with one Banquet page, but for now I prefer once a week updates since my buffer is still pretty small (about a months worth for each comic)
After I get my Bird Boy buffer in a good place I want to be able to update Banquet twice weekly (the pages are much faster to produce, but working two comics has its disadvantages!). I'm hoping to be able to make the move to two pages come fall, but we'll see!