The three surfaces that cause most of the trouble
Stair treads take the heaviest wear and are the hardest to clean well, particularly where the original timber or vinyl is worn at the nosing. The handrail is a touchpoint that gets noticed by anyone climbing with a hand out. The shared toilet is the item that generates actual complaints. Those three deserve individual lines in the scope with their own frequencies, not a single entry reading common areas.
Frequency for the toilet should follow the number of people with access rather than the number of tenancies. A suite of six upstairs and two staff below means eight users, and that is the figure that determines servicing and consumable volume. Writing the user count into the scope makes it obvious later why the frequency was set where it was, and gives a basis for changing it.
