How often do you have sex?

We are 15 months post 1st baby [i had c-section] and I have been breastfeeding ever since.Before baby I have a decent sex drive and we had sex often, but can't recall how often. What is normal post baby? Did you notice a low sex drive while breastfeeding? Did it return back to normal after you stopped? I feel like post baby I can't satisfy my hubby and it's affecting our relationship big time. He wants to do it 3 to 4 times a week and I'm just not in the mood and really have to work HARD and long to even get there. So what is your experience...any advice? Thanks ladies!