bright spot vs epitome

bright spot

noun
  • Used other than figuratively or idiomatically: see bright, spot. 

  • A good part of something that is otherwise fairly bad or unpleasant. 

epitome

noun
  • The height; the best; the most vivid. 

  • The embodiment or encapsulation of a class of items. 

  • A representative example. 

  • A brief summary of a text. 

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