bird's-eye view vs panorama

bird's-eye view

noun
  • The view from directly or high above. 

  • A general overview or summary of a topic. 

panorama

noun
  • An unbroken view of an entire surrounding area. 

  • A comprehensive survey. 

  • A picture or series of pictures representing a continuous scene. 

How often have the words bird's-eye view and panorama occurred in a corpus of books? (source: Google Ngram Viewer )