What has to happen on every one of the three visits
Some items cannot be rotated without the office noticing within a day. Waste is the clearest of them, particularly anything from a kitchen bin, and washroom consumables sit alongside it. Kitchen benches, the sink area and the front of any appliance used for food belong in the same non-negotiable group, because these are the surfaces that generate odour and complaint faster than any carpet ever will.
The reception or entry area is usually the third fixed item. In a suite where clients walk in from the street, the first two metres carry most of the impression, and letting that rotate onto a Tuesday-only cycle undoes the saving. Fixing three items in place and rotating everything else is what makes a reduced frequency defensible rather than simply cheaper.
