storyline vs topic

storyline

noun
  • The plot of a story. 

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

topic

noun
  • Subject; theme; a category or general area of interest. 

  • Discussion thread. 

  • A musical sign intended to suggest a particular style or genre. 

adj
  • topical 

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