Bold vs Slough

Bold

name
  • A civil parish in the Metropolitan Borough of St Helens, Merseyside, England. 

  • A surname. 

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 Bold and Slough occurred in a corpus of books? (source: Google Ngram Viewer )