rough idea vs storyboard

rough idea

storyboard

noun
  • Any sequence of drawings or diagrams which illustrate a sequence of events, e.g. in an accident or as a flowsheet for computer programming. 

  • A series of drawings that lay out the sequence of scenes in a film or series, especially an animated one. 

verb
  • To create and arrange storyboard drawings. 

How often have the words rough idea and storyboard occurred in a corpus of books? (source: Google Ngram Viewer )