People usually pick a cleaning frequency by price and then feel like it is not working. It is worth picking it by household instead, because the right rhythm makes each visit cheaper, not more expensive.
Weekly makes sense for full houses: several people, young children, shedding pets, or a home where the kitchen genuinely gets used three times a day. At this frequency the house never leaves good condition, so each visit is maintenance rather than recovery.
Bi-weekly is the most common choice in Central Illinois and works well for couples, small families, and anyone who tidies during the week but does not want to scrub. Two weeks is about how long a bathroom stays acceptable in a normal household before it needs real attention.
Monthly suits smaller households, people who travel, and homes with little day-to-day traffic. It is a reset rather than maintenance, so the visit is longer, and it is worth pairing with a deep clean once or twice a year.
Two factors override all of the above. Pets, because hair and dander accumulate on a schedule of their own, and allergies, where more frequent visits are less about appearance than about how much dust is in the air.
Whichever you choose, the first visit is usually a deep clean regardless of frequency. Starting from a clean baseline is what lets every visit afterward stay short, and it is the difference between a cleaning schedule that gets easier over time and one that always feels like catching up.