cavalryman vs lancer

cavalryman

noun
  • A soldier in the cavalry. 

lancer

noun
  • A cavalry soldier armed with a lance weapon. 

  • Any of various Asian hesperiid butterflies of the genus Plastingia. 

  • One who lances something. 

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