Related Clues:

• Swing and others
• The Roosevelt years and others
• Indefinitely long time periods
• Biblical you
• Bygone times
• Time spans
• Really long time
• Mesozoic and Paleozoic
• Zillions of years
• Billions of years, geologically
• Historical chapters
• Blocks of time
• Long stretches
• Baroque and Big Band
• Geologists' divisions