legacy vs pourboire

legacy

noun
  • Money or property bequeathed to someone in a will. 

  • The descendant of an alumnus. 

  • Something inherited from a predecessor or the past. 

adj
  • Left over from the past; no longer current. 

pourboire

noun
  • A bribe. 

  • A tip (extra money given to e.g. a waiter in appreciation of service), especially in French contexts. 

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