hussar vs pikeman

hussar

noun
  • A member of the light cavalry of any of several European armies. 

  • A member of the national cavalry of Hungary, Croatia and Poland. 

pikeman

noun
  • A soldier armed with a pike. 

  • A person who operates a turnpike. 

  • A miner who works with a pick. 

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