There is no set schedule for watering. Every pot is different, every soil mix drains different, larger plants use more water than smaller plants. You need to be observant of your plants and water when they need it, not from some schedule gleaned from the internet. Let the pots dry on the surface and down to 1-2 inches in larger pots, then water and let go until dry again. Weighing the pots before and after watering by hand will give you an idea of a wet pot verses a dry one.