enfranchisement vs incarceration

enfranchisement

noun
  • The investiture with any of several municipal privileges 

  • the conversion of a copyhold estate into a freehold estate 

  • The act of enfranchising 

  • A release from slavery 

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 enfranchisement and incarceration occurred in a corpus of books? (source: Google Ngram Viewer )