identification vs insignia

identification

noun
  • A particular instance of identifying something. 

  • The combination of identifying (which one, which thing) and validating the identity (proving or confirming it); identifying and authenticating viewed as a unitary concept in cognition. 

  • A feeling of support, sympathy, understanding, or belonging towards somebody or something. 

  • A document or documents serving as evidence of a person's identity. 

  • The act of identifying (i.e., which one, which thing). 

  • The state of being identified. 

insignia

noun
  • A mark or token by which anything is known. 

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

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

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