dependence vs reliance

dependence

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

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

reliance

noun
  • The condition of being reliant or dependent. 

  • A person or thing which relies on another. 

  • The act of relying (on or in someone or something); trust. 

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