hussar vs man-at-arms

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. 

man-at-arms

noun
  • A heavily-armed mounted member of medieval cavalry. 

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