big picture vs volition

big picture

noun
  • The totality of a situation. 

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

volition

noun
  • A concept that distinguishes whether or not the subject or agent intended something. 

  • A conscious choice or decision. 

  • The mental power or ability of choosing; the will. 

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