What is the normal sex rate for a week?

[joncheong]

i think once every two days is a good number...at least when newly married....after that perhaps twice a week?

[JBII]

My partner and myself have sex twice a week.
It is not a must as external factors such as mood, working schedule, and so on plays a part.
The key aspect of sex is not the number of times, it is keeping it interesting and the chemistry has to strong.