accompanist vs diva

accompanist

noun
  • The performer in music who takes the accompanying part. 

diva

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

  • 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. 

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