disavow vs repudiate

disavow

verb
  • To deny; to show the contrary of; to deny legitimacy or achievement of any kind. 

  • To strongly and solemnly refuse to own or acknowledge; to deny responsibility for, approbation of, and the like. 

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 disavow and repudiate occurred in a corpus of books? (source: Google Ngram Viewer )