boy toy vs dolly-boy

boy toy

noun
  • A toy meant to be played with by a boy. 

  • A gigolo or younger man who is sexually pursued by an older person. 

dolly-boy

noun
  • A toyboy; a gigolo. 

  • The person (e.g. an apprentice) tasked with holding a rivet dolly in an Australian World War 2 aircraft factory. 

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