'Completed' in the Bible

‘Then when seventy years are completed, I will punish the king of Babylon and that nation, the land of the Chaldeans (Babylonia),’ says the Lord, ‘for their wickedness, and will make the land [of the Chaldeans] a perpetual waste.

“For thus says the Lord, ‘When seventy years [of exile] have been completed for Babylon, I will visit (inspect) you and keep My good promise to you, to bring you back to this place.