gonfalon vs guidon

gonfalon

noun
  • A standard or ensign, consisting of a pole with a crosspiece from which a banner is suspended, especially as used in church processions, but also for civic and military display. 

guidon

noun
  • A soldier assigned to carry such a banner. 

  • A small pennant or banner carried by infantry soldiers to direct troop movement. 

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