paladin vs prima donna

paladin

noun
  • A defender or advocate of a noble cause. 

  • Any of the twelve Companions of the court of Emperor Charlemagne. 

  • A heroic champion, especially a knight. 

prima donna

noun
  • 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. 

  • The principal female singer or the leading lady. 

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