- AEONS
- Blue moons
- Ages and ages
- Just about forever
- Big stretches
- Earth science chapters
- Time it takes mountains to form
- Near-eternities
- Long spans
- Extremely long spans
- Interminable spans
- They comprise eternities
- Billion-year spans
- Forever, it seems
- Stretches between ice ages
- Mountain time span
- There have been four in Earth's history
- Galaxies form in them
- Millennia upon millennia
- Very long time
- Many moons
- Almost eternity
- Time spent in line, seemingly
- Big times
- Eternities
- Many, many centuries
- Long stretches
- Long periods
- Long times
- Very long times
- Seemingly forever
- Ages
- Extended period, hyperbolically
- Geologic time periods
- Billions of years
- Forever, or close to it
- Geologic spans
- Long time periods
- Light-years
- Time periods.
- Many years.
- Thousands and thousands of years.
- Eternity.
- Untold years.
- Thousands of years.
- Geologic times.
- Kalpas
- Millennia
- Centuries upon centuries
- Epochs upon epochs
- Untold ages
- Epochs unlimited
- Timeless times
- Umpteen years
- Long periods of time
- Years and years
- Long time
- Units in the life span of a galaxy
- Forever, seemingly
- Almost an eternity
- How long it takes mountains to form
- Time without end
- Untold centuries
- Near eternity
- Time immemorial
- The time it takes mountains to rise
- Time on end
- Millions of millennia
- Bajillions of years
- A while, in hyperbole
- Almost forever
- Practically forever
- Untold millennia
- Long, long times
- Millennia on end
- Seeming eternities
- Forever and ever
- Ages and ages (Var.)
- Eternities: var.
- Incredibly long stretches (Var.)
- Incredibly long stretches
- Immense time periods
- Long times, in London
- Many, many moons
- Milliards of years
- Really long time
- A really long time, in Britain
- Ages and ages, in England
