prima donna vs soulster

prima donna

noun
  • The principal female singer or the leading lady. 

  • A person who considers himself or herself much more important than others, has high expectations of others and becomes angry when his or her standards or demands are not met. 

soulster

noun
  • A performer of soul music. 

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