concede vs repudiate

concede

verb
  • To admit or agree to be true; to acknowledge. 

  • To yield or suffer; to surrender; to grant 

  • To yield or make concession. 

  • (of a bowler) to have runs scored off of one's bowling. 

  • To grant, as a right or privilege; to make concession of. 

  • To have a goal or point scored against 

repudiate

verb
  • To reject the truth or validity of; to deny. 

  • To be repudiated. 

  • To refuse to have anything to do with; to disown. 

  • To refuse to pay or honor (a debt). 

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