Bank vs Borstal

Bank

name
  • A village in the New Forest in Hampshire, England. 

  • A major London Underground station in the City of London, named after the Bank of England and one of the busiest stations on the network (OS grid ref TQ3281) 

  • A surname. 

Borstal

name
  • A suburb, formerly a village, in Rochester, Medway borough, Kent, England (OS grid ref TQ7366). 

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