Devonshire vs Sound

Devonshire

name
  • Former name of Devon (“English county”) (until 1974). 

  • A habitational surname. 

  • An English dukedom and earldom. 

Sound

name
  • Synonym of Plymouth Sound, Devon, England. 

  • The strait that separates Zealand (an island of Denmark) from Scania (part of Sweden); also sometimes called by the Danish name, Øresund. 

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