anecdotal vs diegetic

anecdotal

adj
  • Of the nature of or relating to an anecdote. 

  • Containing or abounding in anecdotes. 

diegetic

adj
  • Of or relating to diegesis. 

  • (of film music) Occurring as part of the action (rather than as background), and able to be heard by the film's characters. 

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