Firth vs Winterbourne

Firth

name
  • A small village in north-east Mainland, Shetland Islands council area, Scotland (OS grid ref HU4473). 

  • A village in Nebraska. 

  • A city and town in Idaho. 

  • A surname. 

Winterbourne

name
  • A large village and civil parish in South Gloucestershire district, Gloucestershire, England (OS grid ref ST6580). 

  • Any of several villages in Britain. 

  • A surname from Old English. 

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