'Years' in the Bible

And the messenger of Jehovah answereth and saith, 'Jehovah of Hosts! till when dost Thou not pity Jerusalem, and the cities of Judah, that Thou hast abhorred these seventy years?'

speaking unto the priests who are at the house of Jehovah of Hosts, and unto the prophets, saying, 'Do I weep in the fifth month -- being separated -- as I have done these so many years?'

When ye fasted with mourning in the fifth and in the seventh months -- even these seventy years -- did ye keep the fast to Me -- Me? And when ye eat, and when ye drink, is it not ye who are eating, and ye who are drinking?