accede vs differ

accede

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

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

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

differ

verb
  • To have diverging opinions, disagree. 

  • Not to have the same traits or characteristics; to be unalike or distinct. 

  • To be separated in quantity. 

noun
  • A program that diffs, a diff. 

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