get rid of vs palm off

get rid of

verb
  • to rid oneself of; dispose (of); to remove; to abolish; to lose 

palm off

verb
  • To sell or dispose of (something) with the intent to deceive; to attempt to pass off a counterfeit or inferior product as genuine. 

How often have the words get rid of and palm off occurred in a corpus of books? (source: Google Ngram Viewer )