communiqué vs exposé

communiqué

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

exposé

noun
  • A publication of investigative journalism that reveals hidden and often scandalous truths. 

  • The act of exposing somebody or something; a shameful showing up. 

  • A formal recital or exposition. 

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