lascar vs water dog

lascar

noun
  • Any of various nymphalid butterflies of the Asian genera Pantoporia and Lasippa. 

  • A tent-pitcher; also a type of artilleryman. 

  • A sailor from India or Southeast Asia, especially as serving on a European ship. 

water dog

noun
  • A retriever type of gun dog bred to flush and retrieve game from water. 

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