Related Clues:
- Big time
- Untold centuries
- Significant time period
- Longest time span, geologically
- Prohibition, e.g.
- Coldwell Banker competitor
- Silent ___ (time before the talkies)
- An earlier one may be recalled
- Many moons
- Paleozoic, for one
- Geological time division
- Historical stage
- Ruth's was 2.28
- Unique stretch in time
- Paleozoic, for example