convocation vs council of war

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. 

council of war

noun
  • A meeting convened to address a crisis or to make a plan of attack. 

  • A committee of high-ranking military officers convened to consult on urgent matters in wartime. 

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