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Where can I find a list of periods of time?

You will find periods of time in the book The Order of Things (B. Kipfer, New York: Random House, 1997). Here are some:

  • millennium = 1000 years
  • half-millennium = 500 years
  • century = 100 years
  • half-century = 50 years
  • score = 20 years
  • decade = 10 years
  • lustrum or half-decade = 5 years
  • quadrennium or olympiad = 4 years
  • triennium = 3 years
  • and biennium = 2 years
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