castrate vs desexualize

castrate

verb
  • To take something from; to render imperfect or ineffectual. 

  • To remove the ovaries and/or uterus of an animal. 

  • To remove the testicles of a person or animal. 

noun
  • A castrated man; a eunuch. 

desexualize

verb
  • To divest of sexual attributes; to render conceptually asexual. 

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