consistory vs convocation

consistory

noun
  • A solemn assembly or council. 

  • An assembly of prelates; a session of the college of cardinals at Rome. 

  • The spiritual court of a diocesan bishop held before his chancellor or commissioner in his cathedral church or elsewhere. 

  • A church tribunal or governing body, especially of elders in a Reformed church. 

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. 

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