epitome vs masterwork

epitome

noun
  • The embodiment or encapsulation of a class of items. 

  • A representative example. 

  • A brief summary of a text. 

  • The height; the best; the most vivid. 

masterwork

noun
  • A piece done to prove possession of skill sufficient to be ranked a master. 

  • A piece of quality, indicative of having been made by a master; a masterpiece. 

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