baby boy vs old sport

baby boy

noun
  • A term of endearment for a man. 

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

  • A man who is immature or infantile. 

old sport

noun
  • A term of endearment used to a friend. 

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