'Divisions' in the Bible

Now these are the divisions of the sons of Aaron. The sons of Aaron; Nadab, and Abihu, Eleazar, and Ithamar.

Concerning the divisions of the porters: Of the Korhites was Meshelemiah the son of Kore, of the sons of Asaph.

Among these were the divisions of the porters, even among the chief men, having wards one against another, to minister in the house of the LORD.

These are the divisions of the porters among the sons of Kore, and among the sons of Merari.