Not every day but usually every other day... and twice at weekends...
There is a culture among some women who seek to avoid sex, going with the Victorian concept of 'endure rather than enjoy' (lie back and think of England) and these women have the idea in thier heads somehow that sex is all for the man and no pleasure for them. Clearly these women have never had it properly...
In my experience, women usually want it more than men and get great pleasure from doing it. The concept of a woman who enjoys sex being a slut is an old one which is unfortunately still out there refusing to die. I say lets make sure it dies as soon as possible...