brandmark vs insignia

brandmark

noun
  • The logo of a brand 

verb
  • To name or mark by branding; to give a brandmark to. 

insignia

noun
  • A symbol or token of personal power, status, or office, or of an official body of government or jurisdiction. 

  • A patch or other object that indicates a person's official or military rank, or membership in a group or organization. 

  • A mark or token by which anything is known. 

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