ISSA publishes a book 540 Cleaning Times do a search for ISSA 540 or 612 Cleaning Times, parrishsupply.com has a pdf version. Ths book show cleaning times for cleaning stairs, cleaning walls, cleaning a restroom etc.
Cleanbid.com offers a free trial for their bidding software--online bidding software where you add in sq ft, room sizes, level of cleaning such as light, moderate and your hourly rate. Then it calculates a bid bid price.
There are some rules of thumb such as 1 person "should" be able to clean 2500-4000 sq ft in 1 hour.
Another rule of thumb is that $.10 or $.05 per hour is usually for larger accounts.
2 day a week cleaning may only consist of 1 day just doing trash & recycle + restrooms + desk tops and the 2nd day cleaning may be a full service day.
It would like something like this
1 day 6 trash 6 recycle 6 desk tops 2 restrooms ( light clean)
6 minutes for trash & recycle - 3 minutes for desk tops - 6 minutes restroom
2nd day Full clean 6 minutes for trash & recycle - 3 minutes for desk tops - 10 minutes restrooms (full clean scrub out fixtures)- vacuum 10 minutes
The above is an example.
Good Luck, I have made my share of bidding boo boos, each bid is a learning experience. Brad BD Janitorial