I try to run my current game every two weeks (fortnightly), but we often have to shift or reslot sessions based on my players’ schedules. My ideal would be to have 2 ongoing, interleaved campaigns with 2 GMs, each running fortnightly.
That’s pretty much the Wednesday group, fortnightly campaigns with two GMs alternating, as I may have said. We tried it with Whartson Hall as well but it was too much context switching for comfort.
I’m GMing seldom and irregularly, and have been for years. Playing a character even less often. I’m starting to wonder whether I ought to give up RPG as a bad job, and take up something like macramé instead.
I have a weekly Wednesday game, which meets a little more than 3 weeks in 4 (as in, we often have several months where we meet all 4, and it’s rare we miss more than one week in the other months).
There are also some occasional games a friend runs, which average out to about 6 Saturdays a year.