There's no single right answer, but there is a simple way to decide: match the schedule to how hard each area gets used.
Restrooms, kitchens, and break rooms get the heaviest use and collect the most germs. For most offices with more than a handful of people, they need attention several times a week.
Desks, conference rooms, and carpeted areas can often go weekly in a small office, while front desks and entryways that customers see should look fresh every business day.
During cold and flu season, add a disinfection pass on high-touch surfaces like door handles, light switches, and shared equipment. It's one of the easiest ways to keep your team healthy and at work.