hieroglyph vs insignia

hieroglyph

noun
  • Any obscure or baffling symbol. 

  • An element of an ideographic (hieroglyphic) writing system. 

verb
  • To represent by hieroglyphs. 

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 hieroglyph and insignia occurred in a corpus of books? (source: Google Ngram Viewer )