gladius vs sword

gladius

noun
  • A Roman sword roughly two feet long. 

  • A pen, a hard internal bodypart of certain cephalopods, made of chitin-like material. 

sword

noun
  • The weapon, often used as a heraldic charge. 

  • A suit in the minor arcana in tarot. 

  • A card of this suit. 

  • A long-bladed weapon device with a grip- a hilt (a pommel and cross guard), which is designed to cut, stab, slash and/or hack. 

  • One of the end bars by which the lay of a hand loom is suspended. 

verb
  • To stab or cut with a sword 

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