'Second' in the Bible

Then on the second day the heads of fathers’ households of all the people, the priests and the Levites were gathered to Ezra the scribe that they might gain insight into the words of the law.

Joel the son of Zichri was their overseer, and Judah the son of Hassenuah was second in command of the city.

and Mattaniah the son of Mica, the son of Zabdi, the son of Asaph, who was the leader in beginning the thanksgiving at prayer, and Bakbukiah, the second among his brethren; and Abda the son of Shammua, the son of Galal, the son of Jeduthun.

The second choir proceeded to the left, while I followed them with half of the people on the wall, above the Tower of Furnaces, to the Broad Wall,