postpubescent vs prepubescent

postpubescent

adj
  • That occurs after puberty. 

noun
  • An individual who has completed puberty; a sexually mature person. 

prepubescent

adj
  • Before the age at which a person begins puberty. 

noun
  • A person who has not begun puberty. 

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