I agree, depends on relationship, kids, single and dating, married, job, travel, etc..
Normal is whatever keeps you happy and content with your partner. Normal to some people is poking your pecker through a hole in the sheet and banging your wifes gargantuous bush for a few minutes. Normal for me is anything i see in my porn

I usually go twice a week since my son was born. Much more before that but relationship, jobs, schedules were also different.
I take it by your post you think you are banging too much, or not enough. Which is it?
Another topic, you dont have to have sex to have an orgasm. If the answer is not enough, then take care of it yourself.