'Appointments' in the Bible

These are sons of Levi, by the house of their fathers, heads of the fathers, by their appointments, in the number of names, by their polls, doing the work for the service of the house of Jehovah, from a son of twenty years and upward,

And David, with Zadok of the sons of Eleazar and Ahimelech of the sons of Ithamar, divided them according to their appointments for their service.

These are their appointments for their service, to come in to the house of Jehovah, according to their ordinance by the hand of Aaron their father, as Jehovah God of Israel, commanded them.