How vs Swallow

How

name
  • A hamlet in Hayton parish, City of Carlisle district, Cumbria, England (OS grid ref NY5056). 

  • A surname. 

  • A town in Oconto County, Wisconsin, United States, named after Calvin F. How Jr. 

Swallow

name
  • A village and civil parish in West Lindsey district, Lincolnshire, England (OS grid ref TA1703). 

  • A surname. 

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