Soar vs Swat

Soar

name
  • A river in Leicestershire, England, a tributary to the Trent. 

Swat

name
  • a river in NWFP administrative province of Pakistan 

  • a valley and a district in NWFP administrative province of Pakistan 

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