colloquium vs press conference

colloquium

noun
  • An address to an academic meeting or seminar. 

  • A colloquy; a meeting for discussion. 

  • 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. 

press conference

noun
  • A question-and-answer session with members of television, print and other media. 

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