arms vs heraldry

arms

noun
  • A visual design composed according to heraldic rules, consisting of a coat of arms normally displayed upon an escutcheon, sometimes accompanied by other elements of an achievement 

  • weaponry, weapons 

heraldry

noun
  • An armorial ensign along with its history and description. 

  • The profession or art of devising, granting and blazoning coats of arms, tracing genealogies and ruling on questions of protocol or rank. 

  • Pageantry. 

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