crown prince vs princess

crown prince

noun
  • A person designated and raised to become the next king. 

  • A person expected to inherit or take over an enterprise or undertaking once its current manager retires or dies. 

  • A person designated and raised to become the next emperor. 

princess

noun
  • The wife of a prince; the female ruler of a principality. 

  • A young girl or woman (or less commonly a man) who is vain, spoiled or selfish; a prima donna. 

  • A tinted crystal marble used in children's games. 

  • A female member of a royal family other than a queen, especially a daughter or granddaughter of a monarch. 

  • A type of court card in the Tarot pack, coming between the 10 and the prince (Jack). 

  • A woman or girl who excels in a given field or class. 

  • A female lemur. 

  • A Bulgarian open-faced baked sandwich prepared with ground meat. 

  • A young girl; used as a term of endearment. 

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