convention vs covenant

convention

noun
  • A formal agreement, contract, rule, or pact. 

  • A treaty or supplement to such. 

  • A meeting or gathering. 

  • A practice or procedure widely observed in a group, especially to facilitate social interaction; a custom. 

  • The convening of a formal meeting. 

  • A formal deliberative assembly of mandated delegates. 

covenant

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

  • 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. 

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

  • To enter a formal agreement. 

  • To make a stipulation. 

  • To bind oneself in contract. 

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