borstal vs graybar hotel

borstal

noun

  • Any of the prisons set up in Britain for delinquent boys from 1895 to 1983. 

  • Any institution which provides education to young offenders. 

  • A way up a hill in the South Downs. 

graybar hotel

name

  • jail, prison 

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