For most people it's once a day, sometimes once every other day. Twice a day can be okay too, but if you're up to 3-4, my gut (see what I did there?) instinct is to talk to your doctor. That's not normal.
I did ask my doctor and they said the same as jaydees doc said. There's no common normal. What ever floats your... Nm, I won't go there. I actually like it this way. It's a fair amount of private time.
As ironrod said, Im also outta wack ifs pattern is thrown off too much. I've been taking to a "late night" break recently. I'm a fan. Speaking of fans. BR fans don't really do much, do they?