'Lifetime' in the Bible

During Jehoram's lifetime, Edom rebelled from Judah's hegemony and appointed a king to rule over themselves.

During the lifetime of King Pekah of Israel, King Tiglath-pileser of Assyria attacked. He captured the cities of Ijon, Abel Beth Maacah, Janoah, Kedesh, and Hazor. He also captured Gilead, Galilee, and the entire territory of Naphtali, and carried its people off to Assyria.

At this, Hezekiah replied to Isaiah, "What you've spoken from the LORD is good," because he had been thinking, "Why not, as long as there's peace and security in my lifetime"?"

During his lifetime, King Nebuchadnezzar of Babylon attacked Jehoiakim, who became his vassal for three years, after which he turned against Nebuchadnezzar and rebelled.