impunity vs incarceration

impunity

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

  • Exemption from punishment. 

incarceration

noun
  • The act of confining, or the state of being confined; imprisonment. 

  • A constriction of the hernial sac, rendering it irreducible, but not great enough to cause strangulation. 

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