'Alternately' in the Bible

Shemaiah, the son of Nethanel the scribe, from the Levites, recorded them in the presence of the king, the officers, Zadok the priest, Ahimelech the son of Abiathar [the priest who escaped Saul’s massacre at Nob], and the heads of the fathers’ households of the priests and of the Levites; one father’s household taken for Eleazar and one taken for Ithamar.