accede vs disagree

accede

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

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

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

disagree

verb
  • To fail to conform or correspond with. 

  • To fail to agree; to have a different opinion or belief. 

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