'Reign' in the Bible

And hired counsellers against them, to frustrate their purpose, all the days of Cyrus king of Persia, even until the reign of Darius king of Persia.

And in the reign of Ahasuerus, in the beginning of his reign, wrote they unto him an accusation against the inhabitants of Judah and Jerusalem.

Then ceased the work of the house of God which is at Jerusalem. So it ceased unto the second year of the reign of Darius king of Persia.

And this house was finished on the third day of the month Adar, which was in the sixth year of the reign of Darius the king.

Now after these things, in the reign of Artaxerxes king of Persia, Ezra the son of Seraiah, the son of Azariah, the son of Hilkiah,

These are now the chief of their fathers, and this is the genealogy of them that went up with me from Babylon, in the reign of Artaxerxes the king.