darling vs fair-haired boy

darling

noun
  • A kind or sweet person; sweetheart. 

  • An affectionate term of address. 

  • A person or thing very popular with a certain group. 

  • A person who is dear to one. 

adj
  • Dear; cherished. 

  • charming 

fair-haired boy

noun
  • Someone's favourite, especially a young one; a blue-eyed boy (British), (Australian) 

How often have the words darling and fair-haired boy occurred in a corpus of books? (source: Google Ngram Viewer )