castrate vs spaie

castrate

noun
  • A castrated man; a eunuch. 

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. 

spaie

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