I worked as a clearner while I was at uni. One of the houses was a 5 bed (not all set up as bedrooms) spread accross 3 floors I did 3 hours a week. An hour (rough average) of that was spent on ironing.
Weekly:
Cleaned, swept and mopped:
Kitchen and utility room,
Main bathroom,
En-suite bathroom,
Top floor shower room,
Master bedroom,top floor sitting room, dressing room and study got dusted, mirrors polished and hoovered.
All bins emptied and liners replaced when needed.
The main front room and dining room were done when needed as they seldom used them. The guest bedroom and en-suite were done on request before and after they had guests coming.
All halways, landings and staircases were hoovered weekly, and dusted fortnightly.
With whatever time was left I would work through the doors and skirting boards (usually one floor per week), then do likewise with the windows, then do the oven and fridge. The routine would then start again from the paintwork.
Granted there was only the two of them living there, so it would have been much quicker than cleaning a home with a family, but I still don't see how it's taking more that 4 hours to do the basics in a property that size when it's getting done weekly.