'Years' in the Bible

Now from the time when I was made ruler of the people in the land of Judah, from the twentieth year till the thirty-second year of Artaxerxes the king, for twelve years, I and my servants have never taken the food which was the right of the ruler.

Truly, for forty years you were their support in the waste land, and they were in need of nothing; their clothing did not get old or their feet become tired.