adoptee vs baby boy

adoptee

noun
  • A person who was adopted as a child. 

  • Synonym of adopter 

  • An adopted son or daughter. 

baby boy

noun
  • A very young male human being, from birth to a couple of years old. 

  • A term of endearment for a man. 

  • A man who is immature or infantile. 

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