Dart vs Sound

Dart

name
  • A river in Devon, England, which flows from Dartmoor to the English Channel at Dartmouth. 

  • A town in Ontario, Canada 

  • A surname from Middle English. 

noun
  • An officer trained at Britannia Royal Naval College, Dartmouth, England. 

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 Dart and Sound occurred in a corpus of books? (source: Google Ngram Viewer )