mythos vs storyline

mythos

noun
  • A story or set of stories relevant to or having a significant truth or meaning for a particular culture, religion, society, or other group; a myth, a mythology. 

  • A set of assumptions or beliefs about something. 

  • A recurring theme; a motif. 

  • Anything transmitted by word of mouth, such as a fable, legend, narrative, story, or tale (especially a poetic tale). 

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. 

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