big picture vs ground plan

big picture

noun
  • Used other than figuratively or idiomatically: see big, picture. 

  • The totality of a situation. 

ground plan

noun
  • A diagram showing set layout. 

  • Framework or pattern. 

  • Hypothetical ancestor of a clade. 

  • Floorplan. 

How often have the words big picture and ground plan occurred in a corpus of books? (source: Google Ngram Viewer )