Related Clues:

• Forever, seemingly
• Many a moon
• Clock watcher's wait, seemingly
• Endless years
• A lo-o-ong time
• Two or more eras
• Chorus member
• Barbershop quartet part
• Very long stretch
• Geologist's measure
• Time on end
• Many, many moons
• Unit of Time
• Millennia upon millennia
• Many centuries