crown princess vs daughter

crown princess

noun
  • The wife of a crown prince. 

  • The heiress apparent to the throne in a royal or imperial monarchy. 

daughter

noun
  • A familiar address to a female person from an older or otherwise more authoritative person. 

  • A daughter language. 

  • One’s female offspring. 

  • A nuclide left over from radioactive decay. 

  • A female character of a creator. 

  • A female descendant. 

  • A descendant. 

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