abstention vs procreation

abstention

noun
  • Non-participation in the political world; as a country avoiding international affairs. 

  • The act of declining to vote on a particular issue. 

  • The act of abstaining or refraining (from). 

procreation

noun
  • The sexual activity of conceiving and bearing biological offspring 

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

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