accede vs disown

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). 

disown

verb
  • To refuse to own, or to refuse to acknowledge one’s own. 

  • To repudiate any connection to; to renounce. 

  • To detach (a job or process) so that it can continue to run even when the user who launched it ends his/her login session. 

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