concealment vs exposure

concealment

noun
  • The practice of keeping secrets. 

  • protection from observation or surveillance. 

  • The condition of being hidden or concealed. 

exposure

noun
  • Details of the time and f-number used. 

  • The condition of being exposed, uncovered, or unprotected. 

  • The act of exposing something, such as a scandal. 

  • That part which is facing or exposed to something, e.g. the sun, weather, sky, or a view. 

  • Lack of protection from weather or the elements. 

  • The piece of film exposed to light. 

  • The amount of sun, wind etc. experienced by a particular site. 

  • The act or condition of being at risk of financial losses. 

  • An instance of taking a photograph. 

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