answerability vs impunity

answerability

noun
  • The state of being answerable. 

impunity

noun
  • Freedom from punishment or retribution; security from any reprisal or injurious consequences of an action, behaviour etc. 

  • Exemption from punishment. 

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