There's no single right answer, but there is a right way to decide. Start with three questions: how many people use the space each day, how many visitors come through, and whether there's a kitchen or break room.
Small offices with a handful of staff and few visitors usually do well with weekly cleaning, plus trash removal between visits. Once you pass fifteen or twenty people, or add a shared kitchen, two or three visits a week keeps restrooms and break rooms from falling behind.
Offices with public traffic, like medical and dental practices, real estate offices, and other customer-facing businesses, usually need nightly cleaning. Front desks, door handles, and restrooms see the most hands, and first impressions happen in the lobby.
Whatever the frequency, put it in writing. A good cleaning scope lists each task by area and how often it happens, so nothing depends on memory. GC Cleaning is open 24/7, so we can clean after close, overnight, or on weekends without interrupting your team.