foist off vs palm off

foist off

verb
  • To fraudulently or disingenuously pass (goods, or ideas) on to. 

  • To get rid off (something unwanted) by giving it to someone else. 

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 foist off and palm off occurred in a corpus of books? (source: Google Ngram Viewer )