Twenty and two years - Rather, from a comparison between 1 Kings 15:10 and 1 Kings 22:51, not more than 21 years. Perhaps his reign did not much exceed 20 years.
Related Commentaries of 1 Kings 16:29
1 Kings 16:29
29 And in the thirty and eighth year of Asa king of Judah began Ahab the son of Omri to reign over Israel: and Ahab the son of Omri reigned over Israel in Samaria twenty and two years.