My husband works two days on two off and he stays at work for his two days on. We don't get all that much time together. We would like to do it more but there is just so much going on right now. When we do have time it is well worth it!
It depends on what's going on outside of the bedroom. Some days all is well and we're like bunnies in the spring, other days life is raining hard on us and it takes a little more effort to get into the mood.
I put 4 - 5 times but it really depends on some things. I'm assuming this is partner sex not solo sex and then there's work, kids, life and it never fails shit always happens. Hubby just had a death of a friend and I completely expected to live on the luxury of my toys for awhile. You just never know what life will send you.