convocation vs paction

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. 

paction

noun
  • A pact, an agreement. 

verb
  • To form a pact; to make a binding agreement. 

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