young man vs youngness

young man

noun
  • Used other than figuratively or idiomatically: see young, man. 

  • A term of endearment or address by adults for a young boy. 

youngness

noun
  • The state or qualities of being young or youthful; youth. 

How often have the words young man and youngness occurred in a corpus of books? (source: Google Ngram Viewer )