contest vs covenant

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. 

covenant

verb
  • To make a stipulation. 

  • To enter into, or promise something by, a covenant. 

  • To enter a formal agreement. 

  • To bind oneself in contract. 

noun
  • A promise, incidental to a deed or contract, either express or implied. 

  • An incidental clause in an agreement. 

  • An agreement to do or not do a particular thing. 

  • A pact or binding agreement between two or more parties. 

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