Related Clues:
- Huge time unit
- DMV wait, seemingly
- Waiting room wait, seemingly
- Division of a geologic period
- 1,000,000,000,000,000 years, give or take
- We're currently in the Phanerozoic one
- He's full of apprehension, standing up for a long time
- Extensive geological time
- Extremely long geologic division
- It's been a long time
- A freaking eternity, like how long it's taking you to finish this puzzle
- Word found in 'time on end,' appropriately
- Vast period
- Myriad years
- Gazillion years