Probably only once every 3 or 4 weeks, if that.
I like fish, but it is not one I am able to cook well.
I just love bought fish and chips however limit myself, due to them being so unhealthy, to about once every 2 or 3 months.
I do like salmon and I cook this more often than I do white fish.
I rarely eat fish out, as I find baked or grilled fish, while it is healthy, is a bit boring compared to other things on menus!
I eat fish virtually everyday - at minimum 4 times a week. Salmon is my staple however, I also eat lots of tuna (preferably fresh but as a last resort tinned if the cupboard is bare), calamari, ling, barramundi, basa and mussels (although I guess mussels aren't technically fish). I tend to BBQ fish or steam and add lots of veggies and herbs to flavour.