interval vs millennium

interval

noun
  • A period of time. 

  • A connected section of the real line which may be empty or have a length of zero. 

  • An intermission. 

  • half time, a scheduled intermission between the periods of play 

  • The difference (a ratio or logarithmic measure) in pitch between two notes, often referring to those two pitches themselves (otherwise known as a dyad). 

  • Either of the two breaks, at lunch and tea, between the three sessions of a day's play 

  • A distance in space. 

millennium

noun
  • A period of time consisting of one thousand years. 

  • A period of universal happiness, peace or prosperity; a utopia. 

  • The period of one thousand years during which Christ will reign on earth (according to Millenarianist interpretations). 

  • The year in which one period of one thousand years ends and another begins, especially the year 2000. 

How often have the words interval and millennium occurred in a corpus of books? (source: Google Ngram Viewer )