My bad. I know that it's not night after night, but from my seriously "ain't had some in forever" mindset, it's much more regular then the past 16 years for me.
And 3-4 months is not out of line to get back into shape considering how streched out you get when you are past term. I hope that he realizes what a gift he has in you, my dear and treats you like you deserve and want to be treated.
