A daily is the term used in tourism that refers to a night in the establishment. That is, the period between check-in and check-out times. Keep an eye out for not confusing nights with travel days. A 2-day package, for example, represents 3 days of travel.
Example: The traveler arrives in the city of destination on Monday morning (1st day of travel) sleeps from Monday to Tuesday (1st night, 2nd day of travel) sleeps from Tuesday to Wednesday (2nd daily, 3rd day of travel) and goes away on Wednesday night the traveler Took 3 days of travel (Monday, Tuesday and Wednesday) and stayed at the hotel with 2 nights.