boy toy vs manstress

boy toy

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

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

manstress

noun
  • A male equivalent of "mistress"; a male object of one's affections who lies outside of one's primary relationship. 

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