procreation vs revival

procreation

noun
  • The process by which an organism produces others of its biological kind 

  • The sexual activity of conceiving and bearing biological offspring 

revival

noun
  • Renewed interest, performance, cultivation, or flourishing state of something, as of culture, commerce, agriculture. 

  • Reanimation from a state of languor or depression; applied to health, a person's spirits, etc. 

  • Renewed interest in religion, after indifference and decline; a period of religious awakening; special religious interest. 

  • Renewed prevalence of something, as a practice or a fashion. 

  • A Christian religious meeting held to inspire active members of a church body or to gain new converts. 

  • Restoration of force, validity, or effect; renewal; reinstatement of a legal action. 

  • The act of reviving, or the state of being revived. 

  • Revivification, as of a metal. 

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