eradicate vs extirpate

eradicate

verb
  • To pull up by the roots; to uproot. 

  • To destroy completely; to reduce to nothing radically; to put an end to; to extirpate. 

extirpate

verb
  • To pull up by the roots; uproot. 

  • To destroy completely; to annihilate, to cause to go extinct locally. 

  • To surgically remove. 

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