millennium vs past

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. 

past

prep
  • Beyond in place or quantity 

  • Any number of minutes after the last hour 

  • Having recovered or moved on from (a traumatic experience, etc.). 

  • No longer capable of. 

  • Passing by, especially without stopping or being delayed. 

adv
  • In a direction that passes. 

adj
  • Of a period of time: having just gone by; previous. 

  • Having already happened; in the past; finished. 

  • Following expressions of time to indicate how long ago something happened; ago. 

  • Of a tense, expressing action that has already happened or a previously-existing state. 

noun
  • The period of time that has already happened, in contrast to the present and the future. 

  • The past tense. 

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