I'm 51, my wife is 52, we've had two kids together one is 22 and the other is 19.I know the results will vary for this but just curious to see how other couples rate.
We've been together for 26 years and have been married for a bit over 23½ years.
My wife usually initiates sex about a ⅓ of the time. I get turned down, I don't know? Maybe around once every 12-15x that I initiate.
We share sex together usually at around 24-32x a month, yet there are still times when it is a bit more often.
That said, knowing how much sex other couples share, is unlikely to make any difference to how much you and your wife share.