I’m going to give it a go, I think 1/15
I’m not sure I understand your question.
Are you asking how many (what %) of the total players here are what you call “regular players” (as in playing here often)?
Or are you asking how many players here play “regular poker” for real money?
Or maybe you didn’t mean either.
But, if it was the first one, I’d say more than 50% of players here play regularly/often.
If the second, I have no idea.
If neither, then, um, space is cold – maybe that helps. 
J.
I’m a regular player on this site, but impoverishment precludes my playing at a casino for real money (something I once upon a time greatly enjoyed).