dependence vs self-rule

dependence

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

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

self-rule

noun
  • Rule of a group of people by their own leaders as opposed to rule imposed by a foreign government or people. 

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