'Short' in the Bible

Therefore rejoice, O heavens and you who dwell in them [in the presence of God]. Woe to the earth and the sea, because the devil has come down to you in great wrath, knowing that he has only a short time [remaining]!”

and the angel hurled him into the abyss, and closed it and sealed it above him [preventing his escape or rescue], so that he would no longer deceive and seduce the nations, until the thousand years were at an end. After these things he must be liberated for a short time.