concealment vs exposé

concealment

noun
  • The practice of keeping secrets. 

  • protection from observation or surveillance. 

  • The condition of being hidden or concealed. 

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 concealment and exposé occurred in a corpus of books? (source: Google Ngram Viewer )