Charles Ellicott Commentary 2 Kings 15:17

"In the nine and thirtieth year of Azariah king of Judah began Menahem the son of Gadi to reign over Israel, [and reigned] ten years in Samaria." — 2 Kings 15:17 (ASV)

THE REIGN OF MENAHEM. HIS TRIBUTE TO PUL, KING OF ASSYRIA.

Reigned ten years. —And some additional months. (Compare to 2 Kings 15:23).