bird's-eye view vs concept

bird's-eye view

noun
  • A general overview or summary of a topic. 

  • The view from directly or high above. 

concept

noun
  • An abstract and general idea; an abstraction. 

  • A description of supported operations on a type, including their syntax and semantics. 

  • Understanding retained in the mind, from experience, reasoning and imagination; a generalization (generic, basic form), or abstraction (mental impression), of a particular set of instances or occurrences (specific, though different, recorded manifestations of the concept). 

verb
  • to conceive; to dream up 

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