Most people choose a cleaning interval by budget and then feel vaguely disappointed. A better starting question is how many days it takes your house to stop feeling clean, because that number is what the schedule has to beat.
Households with kids, pets, or shoes worn indoors tend to hit that point in five to seven days. Two working adults in a tidy home often make it three weeks. The interval that works is the one that arrives just before the house turns, not long after.
Whatever the interval, the first visit should be a deeper reset. Baseboards, grout, appliance interiors, and light fixtures are all backlog work, and trying to absorb them into a normal visit means the normal work suffers instead.
After that reset, ordinary visits maintain the line rather than fighting to reclaim it. That is why a recurring clean takes less time per visit than a one-time clean of the same house, and why recurring pricing is usually lower.
One practical note: keeping the same team on your home matters more than most people expect. A crew that already knows your dog, your alarm code, and which surfaces you care about most does better work in less time than a rotating roster ever will.