Borstal vs Leavenworth

Borstal

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

Leavenworth

name
  • An unincorporated community in Minnesota; named for American soldier Henry Leavenworth. 

  • A surname. 

  • A city, the county seat of Leavenworth County, Kansas. 

  • A town in Indiana; named for founders Zebulon and Seth Leavenworth. 

  • A city in Washington. 

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