accede vs defy

accede

verb
  • To come to an office, state or dignity; to attain, assume (a position). 

  • To become a party to an agreement or a treaty. 

  • To agree or assent to a proposal or a view; to give way. 

defy

verb
  • To challenge (someone) or brave (a hazard or opposition). 

  • To refuse to obey. 

  • To not conform to or follow a pattern, set of rules or expectations. 

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