Juliet vs significant other

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. 

significant other

noun
  • One's exclusive romantic partner. 

  • A person with whom one has an important bond of some kind. 

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