baby boy vs juvenile

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. 

juvenile

noun
  • A prepubescent child. 

  • A person younger than the age of full criminal responsibility, such that the person either cannot be held criminally liable or is subject to less severe forms of punishment. 

  • A sexually immature animal. 

  • A publication for young adult readers. 

  • A two-year-old racehorse. 

  • A person younger than the age of majority; a minor. 

  • An actor playing a child's role. 

adj
  • Characteristic of youth or immaturity; childish. 

  • Young; not fully developed. 

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