Just some thoughts
Daily when on the move: grease propshaft gland
Weekly: Engine fluids, check levels: State of batteries. Drinking water tank levels. Pumpout tank or cassette, depends upon how many are on board.
Monthly: wash boat down to stop green algae taking a hold: Check state of lines and ropes.
Yearly check blacking and efficacy of antifreeze in both the engine and central heating if boat has this. Flush water system through with propriety cleaner: fresh water tank cleaner - Search
Ad hoc make sure wine cellar is adequately refreshed. 😀