briefing vs communiqué

briefing

noun
  • A presentation of information or instruction; the meeting at which it is presented. 

  • A short and concise summary of a situation. 

communiqué

noun
  • An official report or statement, such as a government press release or the report of a conference. 

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