schoolgirl vs teen

schoolgirl

verb
  • To restrain in a schoolgirl pin. 

noun
  • A girl attending school. 

teen

noun
  • Vexation; anger; hate. 

  • Synonym of teenager: a person between 13 and 19 years old. 

adj
  • Of or having to do with teenagers; teenage 

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