'Years' in the Bible

And after that, Hezron had connection with the daughter of Machir, the father of Gilead, whom he took as his wife when he was sixty years old; and she had Segub by him.

He had six sons in Hebron; he was ruling there for seven years and six months, and in Jerusalem for thirty-three years.

Three years when there will not be enough food; or three months of war, when you will go in flight before your haters, being in great danger of the sword; or three days of the sword of the Lord, disease in the land, and the angel of the Lord taking destruction through all the land of Israel. Now give thought to the answer I am to take back to him who sent me.

And the Levites, all those of thirty years old and over, were numbered; and the number of them, by heads, man by man, was thirty-eight thousand.

These were the sons of Levi, grouped by families, the heads of the families of those who were numbered by name, by heads, all those of twenty years old and over who did the work of the house of the Lord.

So among the last acts of David was the numbering of the sons of Levi, from twenty years old and over.

But David did not take the number of those who were under twenty years old, for the Lord had said that he would make Israel like the stars of heaven in number.

For forty years he was ruling as king over Israel, seven years in Hebron and thirty-three years in Jerusalem.