Juliet vs sweetheart

Juliet

name
  • A woman who is or is with a great lover. 

  • The sixth moon of the planet Uranus. 

  • One of the main characters of William Shakespeare's play Romeo and Juliet. 

  • By analogy with the Shakespearean character, a woman who is in love with a man from a family, party, or country opposing that of her own. 

  • A female given name from Latin. 

sweetheart

noun
  • A person who is always very kind. 

  • A person very much liked or loved by someone, especially when both partners are young. 

  • A female member of a college or university fraternity. 

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