diva vs exemplar

diva

noun
  • A person who may be considered or who considers herself (or by extension himself) much more important than others, has high expectations of others and who is extremely demanding and fussy when it comes to personal privileges. 

  • Any female celebrity, usually a well known singer or actress. 

exemplar

noun
  • A role model. 

  • A handwritten manuscript used by a scribe to make a handwritten copy; the original copy of what gets multiply reproduced in a copy machine. 

  • A well known usage of a scientific theory. 

  • Something fit to be imitated; an ideal, a model. 

  • A pattern after which others should be made; an archetype. 

  • A copy of a book or piece of writing. 

  • Something typical or representative of a class; an example that typifies. 

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