bird's-eye view vs eyesight

bird's-eye view

noun
  • The view from directly or high above. 

  • A general overview or summary of a topic. 

eyesight

noun
  • View or the range of vision. 

  • Vision or the faculty of sight. 

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