contest vs polemicize

contest

verb
  • To make a subject of litigation; to defend, as a suit; to dispute or resist, as a claim, by course of law. 

  • To strive earnestly to hold or maintain; to struggle to defend. 

  • To call into question; to oppose. 

  • To contend. 

noun
  • Controversy; debate. 

  • Struggle for superiority; combat. 

  • A competition. 

polemicize

verb
  • To engage in argument. 

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