centralize vs palm off

centralize

verb
  • To move power to a single, central authority 

  • To move things physically towards the centre; to consolidate or concentrate 

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