Once a week and my partner does it.
No kids. No pets. Very small two bedroom house, although one bedroom is out of use at the moment due to a huge water leak, so just one currently.
I would love to do it more but it just takes too much energy out of me. I have MS - I'm not just a lazy bitch
My partner works really, really, really long hours and hates housework. It is still the biggest thing we argue about, because he doesn't give a toss whereas I get really stressed and upset about not being able to keep on top of things - so I'm in the process of arranging a cleaner to come in fortnightly. Would love them to come every week but just can't afford it but I can muddle through the week they don't come. My partner will still vacuum and change the bed weekly though - my two most energy zapping chores.