guidon vs logo

guidon

noun
  • A soldier assigned to carry such a banner. 

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

logo

noun
  • An ensign, a badge of office, rank, or power. 

  • An audio recording for the same purpose; a jingle. 

  • A visual symbol or emblem that acts as a trademark or a means of identification of a company or organization. 

  • A single graphic which contains one or more separate elements. 

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