The most common mistake with recurring cleaning is choosing a frequency based on square footage. A large house with two tidy adults can stay perfectly comfortable on a monthly visit. A small apartment with two kids, a dog, and a home office cannot, and no amount of extra time on each visit fixes that.
What actually drives the right frequency is traffic: how many people, how many pets, how much cooking, and how much of the day is spent at home. Those four things decide how fast a house drifts away from clean, and the schedule should match the drift rate.
Weekly makes sense for busy households, homes with shedding pets, anyone cooking most nights, and anybody who works from home and would rather not spend the weekend catching up. At weekly, each visit is shorter because nothing has time to build up.
Bi-weekly is the most common choice and the most balanced one. It holds a house at a steady baseline for most families, as long as the first visit is a deep clean that establishes that baseline rather than a regular clean that inherits whatever was already there.
Monthly works for smaller households, second homes, and people who keep up with daily tidying themselves and want the heavier work handled. Expect each monthly visit to take longer, because a month is enough time for kitchens and bathrooms to need real attention again.
Whatever you choose, start with a deep clean and then step down to the recurring rhythm. Starting a bi-weekly schedule on a house that has not been deep cleaned in two years means the first several visits are spent catching up on work you are paying maintenance rates for.