I'm 33 and she's 31 and I'd say we average about once a week. Sometimes we'll go up to 3 weeks without it and some weeks we'll do it 3-4 times, depending on what's going on in life. She definitely wants it more than me too.
I should also mention that we both work and go to school full time and have a 4 year old kid, so we don't get much alone time. If we had more free time I'm sure it would be closer to 2-3 times a week.
This kind of stuff completely depends on so many factors and the quirks of each individual. Stress, diet, mood, work, time, hormones, season, etc.
For me a big one is stress. I don't know if it's a typical gender thing, but when I'm stressed out, I want to hump anything that moves as a form of release. When my... friend... is stressed out, she can't get in the zone at all. Which makes for not much sexies when there's a universally stressful environment on both of us. Also, I've had some major slumps where I couldn't give a shit about sex outside of the occasional fap or BJ. Those are rough since it's difficult to get it across to your partner that it's not them.
I've been all over the map with frequency though. In college, I was a 1~2 per day wild fun sexies, then it slowly faded into 1 per day, and careers/adult life turned it into a 1 per week.
I'd say 5 times a week average. Cock's a bit too large for more frequent.
Can go from 1 to 5, we keep busy and still getting used to living together, so cleaning the house, the dog, and whatever else like movies eats up time. Usually Saturday evenings, and during the week whenever we feel like it at night.
Every 3 or 4 days. Long term relationship.
How long?
Crush all the beliefs you think you're crushing, but I know exactly what she likes to get her off. I also know the difference between faking and her leg muscles spasming uncontrollably. I wasn't concerned as to what the problem was. I know that I don't get her in the mood often enough nor does she even like having sex very often. I was simply curious as to the frequency of others.
Once a month. Sometimes once every other month.
I'm serious.
I beat off with the fury of dual K.clubs just thinking about it.