correctional vs reformatory

correctional

adj
  • Of, pertaining to, or intended for correction. 

  • Of or pertaining to the imprisonment or rehabilitation of convicted criminals. 

reformatory

adj
  • Of, pertaining to, or conducive to reform; reformative. 

noun
  • A prison, especially one for juveniles; a reform school. 

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