centralize vs hand down

centralize

verb
  • To move power to a single, central authority 

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

hand down

verb
  • To donate (as second hand.) 

  • To forward to the proper officer (the decision of a higher court). 

  • To transmit in succession, as from father to son, or from predecessor to successor. 

  • To deliver (the decision of a court, etc.) 

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