dependence vs enfranchisement

dependence

noun
  • The state of being dependent, of relying upon another. 

  • An irresistible physical or psychological need, especially for a chemical substance. 

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 

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