storyline vs subject matter

storyline

noun
  • A narrative description of a given modeling scenario, highlighting its main characteristics and underlying technical and socioeconomic drivers. 

  • The plot of a story. 

subject matter

noun
  • The matter or thought presented for consideration in some statement or discussion; that which is made the object of thought or study. 

How often have the words storyline and subject matter occurred in a corpus of books? (source: Google Ngram Viewer )