Canning vs Slough

Canning

name
  • A civil parish of Queens County, New Brunswick, Canada. 

  • The City of Canning, a local government area in Perth, Western Australia. 

  • A village in Nova Scotia. 

  • A river in Alaska. 

  • A surname. 

  • A river in Western Australia, named after George Canning. 

Slough

name
  • A borough and unitary authority (Slough Borough Council) in Berkshire. 

  • A town in east Berkshire, England (formerly Buckinghamshire), close to Heathrow Airport. 

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