exterminate vs wipe off the face of the earth

exterminate

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

  • To bring a definite end to; finish completely. 

wipe off the face of the earth

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