For comics I know I can continuously work on, my two main comics "Sticktoons" and "That Moment When..." are updated on Sundays and Thursdays. In retrospect, I do things in a "season-based" format, so I have the comics created in advance (and edited and proof-read prior to publishing), then have them ready and on schedule.
Some of my other comics like "Mellisa & Julianna" are at times tied with literature stories based on those comics. Anything that often happens in the continuity of the stories can and will carry over into the comic strips.