I think the important point is not that it can't be broken down to a hourly rate, but that the smallest incrememt is 1 week or a day. They simply can't book you

I think the important point is not that it can't be broken down to a hourly rate, but that the smallest incrememt is 1 week or a day. They simply can't book you by the hour. Specifying what a week or day is, is up to you. In regards to time as well as money.