Pang vs Swale

Pang

name
  • A minor river in Berkshire, England, which flows into the Thames at Pangbourne. 

  • A surname from Khmer. 

  • A surname from Chinese. 

Swale

name
  • A river, a tributary of the Ure in North Yorkshire, England. 

  • A local government district with borough status in Kent, England, created in 1974 with its headquarters in Sittingbourne and named after the channel 

  • The Swale, a channel between the Isle of Sheppey and the Kentish mainland 

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