'Years' in the Bible

Ish-Bosheth the son of Saul [was] forty years old when he became king over Israel and he reigned two years; however, the house of Judah {followed} David.

The number of days that David was king over Hebron, over the house of Judah, [was] seven years and six months.

(Now Jonathan the son of Saul had a son who [was] crippled in the feet. He [was] five years old when the message of Saul and Jonathan came from Jezreel, and his nurse had picked him up and fled. It happened that as she [was] hurrying away to flee, he fell and became crippled. His name [was] Mephibosheth.)

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

He reigned over Judah at Hebron [for] seven years and six months; and he reigned over all Israel and Judah at Jerusalem [for] thirty-three years.

{About two full years later}, Absalom's shearers were in Baal Hazor, which [is] near Ephraim, and Absalom summoned all the sons of the king.

But Absalom had fled and went [to] Geshur, and he [was] there three years.

Absalom lived in Jerusalem {two full years}, but he did not see the face of the king.

It happened at the end of four years [that] Absalom said to the king, "Please let me go and pay my vow which I have made to Yahweh in Hebron,

Now Barzillai [was] very old, {eighty years old}. Now he had provided the king [with food] while he [was] staying at Mahanaim, for he [was] a very wealthy man.

Then Barzillai said to the king, "What [are] the days of the years of my life, that I should go with the king to Jerusalem?

I [am] eighty years old today. Can I discern between good and bad? Or can your servant taste what I eat or what I drink? Or can I still hear the voice of singing men and women? Why should your servant be a burden any longer to my lord the king?

There [was] a famine in the days of David [for] three years, year after year. And David {inquired of Yahweh}, and Yahweh said, "The bloodguilt [is] on Saul and on his household, because he killed the Gibeonites."

Then Gad came to David, and he told him and said to him, "Shall seven years of famine in the land come to you? Or three months of your fleeing from your enemies while he [is] pursuing you? Or should there be three days of pestilence in your land? Now consider and decide what I must return to the one who sent me a word."