At the end of three years, to wit, of the siege, i.e. in the third year, as this phrase is used, Deuteronomy 14:28 Joshua 9:16,17 Jer 34:14, compared with Exodus 21:2.
Related Commentaries of 2 Kings 18:10
2 Kings 18:10
10 And at the end of three years they took it: even in the sixth year of Hezekiah, that is the ninth year of Hoshea king of Israel, Samaria was taken.