adolescent vs teenage

adolescent

adj
  • Of, relating to, or at the age of adolescence; at the stage between being a child and an adult. 

noun
  • A person who is in adolescence; someone who has reached puberty but is not yet an adult. 

teenage

adj
  • Of or relating to an age between thirteen and nineteen years old. 

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