disburden vs eradicate

disburden

verb
  • To rid of a burden; to free from a load carried; to unload. 

  • To free from a source of mental trouble. 

eradicate

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

  • To pull up by the roots; to uproot. 

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