I chose more than once a week. I have one almost weekly 4e game I play in (we aim for weekly, but cancel if anyone can't make it, so we average about 3 weekends a month, usually more, but less during holidays). I play in one 4e game that usually meets 1-2 times a month, that we've been trying to make more consistently twice a month. I also run a 4e game that usually meets about twice a month. So overall I play more than once a week, although there is the occasional week with no game and some weeks which have 3 D&D games. The number goes up if you include the two non-D&D games I play in (one 1/week, the other about 1/month).