'Years' in the Bible

Words of Amos -- who hath been among herdsmen of Tekoa -- that he hath seen concerning Israel, in the days of Uzziah king of Judah, and in the days of Jeroboam son of Joash king of Israel, two years before the shaking;

And I -- I have brought you up from the land of Egypt, And cause you to go in a wilderness forty years, To possess the land of the Amorite.

Sacrifices and offering did ye bring nigh to Me, In a wilderness forty years, O house of Israel?