debutante vs young lady

debutante

noun
  • A young woman who makes her first formal appearance in society. 

  • A female debutant, especially in sport and entertainment. 

young lady

noun
  • Used other than figuratively or idiomatically: see young, lady. 

  • A term of endearment or admonishment by adults for a young girl. 

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