adolescence vs underage

adolescence

noun
  • The transitional period of physical and psychological development between childhood and maturity. 

underage

noun
  • A deficit or shortfall in funds, inventory, or capacity. 

adj
  • Not yet a legal adult; still a minor. 

  • Below the legal age for some activity, such as drinking or having sex. 

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