big picture vs scenario

big picture

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

  • The totality of a situation. 

scenario

noun
  • An outline of the plot of a dramatic or literary work. 

  • An outline or model of an expected or supposed sequence of events. 

  • A screenplay itself, or an outline or a treatment of it. 

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