heraldry vs second lieutenant

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. 

second lieutenant

noun
  • The lowest rank of a commissioned army officer, below a lieutenant. 

  • The lowest rank of a commissioned officer in the United States Army, United States Air Force, or United States Marine Corps, below a first lieutenant. The rank of second lieutenant is equivalent to the naval rank of ensign. 

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