generic / standard values for staff cleaning time & training

The LEED language is pretty vague on requirements for staff cleaning hours & training time, so we understand that it should be developed on a case by case basis per building/circumstances, but is there any guidance/rule of thumb for setting total staff cleaning time under typical conditions, as well as the annual training hours? We have a client that is trying to put generic language in a corporate cleaning manual that will cover a portfolio of many different buildings. Any help/guidance determining some generic or standard values is appreciated. Thanks!