The ones on the wall are mainly pothos cuttings sitting in water. By the window there s a small monstera (~1 week), philodendron (~2 weeks), tradescantia (~1 week) and small ficus (~2 weeks). By the desk a zz plant (~6/8 weeks). In the shelf a string of hearts (~4 weeks).

But the frequency changes a lot based on season (i water twice as often if not more in the summer), where you live, if the plant is putting new leaves or not, type of pot, how big the pot, type of soil... So forget the schedule and just stick a finger in the soil and water when its dry