Related Clues:
- Loooong time
- It's comprised of ages and ages
- Heck of a long time
- Really big span
- Years and years on end
- Unimaginably long time
- Long, long time (Var.)
- Long time division
- Geological time span
- Span longer than an era
- Exceedingly long time
- Long time span
- Long time, geologically
- It may be after lunch
- Long geological stretch