It depends really. Sometimes when I have nothing to do I'll be on here for hours at a time, but when I'm quite busy and have a lot of work to do as well as other committments i'll rarely make it on once a few days or so. But this is place is awesome and I wouldn't be anywhere else on the web.
lately I've been on more than usual, both timewise and frequency...around 3 hours a day or more when I can fit it in...I love this board and plan on being on more often