Stress and workload affect this. Last summer when I was off from work as a teacher it was at least twice daily. Laying around chilling, playing video games in my BF's apartment...we were at it like rabbits. All I was doing was cooking, gaming, and fukkin.
Just chilling, go hit the gym for a lil bit then get back to it. So in low stress situations, at least twice.
But as a woman I learned that I don't prioritize intimacy or sex when I have too much going on or I'm too stressed. During those times its like once or twice per week.