The term 'long, long time' can be expressed in a variety of ways. The crossword solutions for this term include EON (3 letters), AGES (4 letters), EONS (4 letters), MILLENIUM (9 letters), EPOCH (5 letters), AEON (4 letters), ETERNITY (8 letters), ERA (3 letters), and MONTHOFSUNDAYS (14 letters). EON, EONS, and AEON refer to an indefinitely long period of time, while AGES and millenium refer to a period of 1000 years. An EPOCH is a particular period of time marked by significant events or characteristics, and an ERA is a period of time marked by a distinctive character or style. ETERNITY is an infinite amount of time, and a monthofsundays is a figurative expression for a very long time.