legacy vs museum piece

legacy

noun
  • Something inherited from a predecessor or the past. 

  • The descendant of an alumnus. 

  • Money or property bequeathed to someone in a will. 

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  • Left over from the past; no longer current. 

museum piece

noun
  • A very old item, especially an obsolete piece of technology. 

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