I do it all by myself.
Bathrooms are done weekly from top to bottom. Floors are vacuumed/swiffered every 2-3 weeks and mopped monthly (we have no pets and do not wear shoes in the house so there's not much dirt or dust.) Furniture and countertops are dusted/wiped down every two weeks and as needed, including sideboards and closets.
Every quarter I do a deep clean (pull out a ladder and dust ceiling fans, pictures/paintings, railings, sideboards, light fixtures, furniture oil the wood, condition leather furniture, etc). I also use that time to go through everything and eliminate any clutter (ie junk drawers, etc).