colloquium vs convening

colloquium

noun
  • A colloquy; a meeting for discussion. 

  • An address to an academic meeting or seminar. 

  • An academic meeting or seminar usually led by a different lecturer and on a different topic at each meeting. 

  • That part of the complaint or declaration in an action for defamation which shows that the words complained of were spoken concerning the plaintiff. 

convening

noun
  • An assembly; a meeting. 

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