convocation vs parley

convocation

noun
  • An assembly or meeting. 

  • The act of calling or assembling by summons. 

  • An assembly of the clergy, by their representatives, to consult on ecclesiastical affairs. 

  • An academic assembly, in which the business of a university is transacted. 

  • A flock of eagles. 

parley

noun
  • A conference, especially one between enemies. 

verb
  • To have a discussion, especially one between enemies. 

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