'Years' in the Bible

Ishbosheth Saul's son was forty years old when he began to reign over Israel, and he reigned two years. However, the house of Judah followed David.

And the time that David was king in Hebron over the house of Judah was seven years and six months.

And Jonathan Saul's son had a son that was lame of his feet. He was five years old when the news came of Saul and Jonathan out of Jizreel; and his nurse took him up and fled. And it came to pass, as she made haste to flee, that he fell, and became lame. And his name was Mephibosheth.

David was thirty years old when he began to reign; he reigned forty years.

In Hebron he reigned over Judah seven years and six months; and in Jerusalem he reigned thirty-three years over all Israel and Judah.

And it came to pass after two full years, that Absalom had sheepshearers in Baal-Hazor, which is beside Ephraim; and Absalom invited all the king's sons.

Now Absalom fled, and went to Geshur, and was there three years.

So Absalom dwelt two full years in Jerusalem, and did not see the king's face.

And it came to pass at the end of forty years, that Absalom said to the king, I pray thee, let me go and pay in Hebron my vow which I have vowed to Jehovah.

And Barzillai was very aged, eighty years old; and it was he that had maintained the king while he abode at Mahanaim; for he was a very great man.

And Barzillai said to the king, How many are the days of the years of my life, that I should go up with the king to Jerusalem?

I am this day eighty years old: can I discern between good and bad? can thy servant taste what I eat and what I drink? can I hear any more the voice of singing men and singing women? and why should thy servant be yet a burden to my lord the king?

And there was a famine in the days of David three years, year after year; and David inquired of Jehovah. And Jehovah said, It is for Saul, and for his house of blood, because he slew the Gibeonites.

And Gad came to David, and told him, and said to him, Shall seven years of famine come to thee in thy land? or wilt thou flee three months before thine adversaries while they pursue thee? or shall there be three days' pestilence in thy land? Now be aware and consider what word I shall bring again to him that sent me.