deracinate vs expunge

deracinate

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

  • To liberate or be liberated from a culture or its norms. 

  • To force (people) from their homeland to a new or foreign location. 

expunge

verb
  • To erase or strike out. 

  • To eliminate completely; to annihilate. 

  • To delete permanently (e-mail etc.) that was previously marked for deletion but still stored. 

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