'Reign' in the Bible

In the third year of the reign of Jehoiakim king of Judah, Nebuchadnezzar king of Babylon came to Jerusalem and besieged it.

Now in the second year of the reign of Nebuchadnezzar, Nebuchadnezzar had dreams; and his spirit was troubled and his sleep left him.

So this Daniel enjoyed success in the reign of Darius and in the reign of Cyrus the Persian.

In the third year of the reign of Belshazzar the king a vision appeared to me, Daniel, subsequent to the one which appeared to me previously.

in the first year of his reign, I, Daniel, observed in the books the number of the years which was revealed as the word of the Lord to Jeremiah the prophet for the completion of the desolations of Jerusalem, namely, seventy years.