Burn vs Warden

Burn

name

  • A village and civil parish in Selby district, North Yorkshire, England (OS grid ref SE5928). 

  • A surname. 

Warden

name

  • A village and civil parish in south Northumberland, England (OS grid ref NY9166). 

  • A surname originating as an occupation for a warden. 

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