exterminate vs slay

exterminate

verb
  • To kill all of (a population of pests or undesirables), usually intentionally. 

  • To bring a definite end to; finish completely. 

slay

verb
  • To kill; to murder. 

  • To defeat; to overcome (in a competition or contest). 

  • To amaze, stun, or otherwise incapacitate by excellence; to excel at something. 

  • To have sex with. 

  • To delight or overwhelm, especially with laughter. 

  • To eradicate or stamp out. 

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