repudiate vs retain

repudiate

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

  • To be repudiated. 

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

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

retain

verb
  • To hold back (a pupil) instead of allowing them to advance to the next class or year. 

  • To employ by paying a retainer. 

  • To keep in one's pay or service. 

  • To keep in possession or use. 

  • To hold secure. 

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