How Many Times Do You Have Sex With Your Partner Every Week?

In the beginning, sex was exciting and something couples do quite a fair bit. For my partner and myself, we would have sex almost everyday. But that has dwindled down to once a week and we’ve been together for 3 years now. How often do you and your husband/wife have sex in a week? Is there a “normal” number? Do you compare how many times you have sex with other couples?