obviously monthly is 12 cleans a year
4 weekly is 13 a year
even if you say monthly to the customer, do you then adjust it to 4 weekly for your callendar? do the customers comment on this?
i think 4 weekly sounds more frequent than monthly somehow (more frequent than it actually is), and monthly seems more orderly, so i am more prone to say monthly as to stop people saying "4 weekly sounds too often, how about 6 weekly"
but monthly i suspect creates more organising. do the computer softwares not do it by weeks?
maybe 12 4-weekly cleans makes sense as then you make space for your holiday!
what do you think?
ben-san