time words

How we think of time

• minute
  
• hour
  
• day
  
• week
  
• month
  
• year
  
• (5-year)?
  
• decade
  
• generation/active life/career (20~ years ?)
  
• lifespan (technically eon, or age)
  
• century (now also an eon)
  
• period (i.e. 200 years, as in "the enlightenment" or "the renaisance")
  
• age [agrarian empires, 3500-800 BC, axial age 800 BC-600 AD, middle ages 600 AD-1450, capitalist empires 1450--] (missaplied term, but who is picky)
  
• millenium