My agency maid comes three times a week
4 hours on Sunday to do a massive pile of ironing and clean the house
2 hours Tuesday
2 hours Thursday
Not sure why I bother though because 1/2 hour after she has been the house is a tip again. Still...at least she gets through the ironing which in my house is a big thing.
If the agency you use is like the one we use, 4 hours is the min for each day they are there. If you want 5 days a week you may want to considering getting an actual maid to live in. Will most likely be cheaper for you in the end.