lascar vs midshipman

lascar

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

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

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

midshipman

noun
  • An officer of the lowest rank in several navies; especially, a trainee officer. 

  • A midshipman fish. 

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