iconic vs signature

iconic

adj
  • Distinctive, characteristic, indicative of identity. 

  • Relating to, or having the characteristics of, an icon. 

  • Representing something; symbolic. 

  • Famously and distinctively representative of its type. 

signature

adj
  • Distinctive, characteristic, indicative of identity. 

noun
  • A mark or sign of implication. 

  • Signs on the stave indicating key and tempo, composed of the key signature and the time signature. 

  • A pattern used for matching the identity of a virus, the parameter types of a method, etc. 

  • Text (or images, etc.) appended to a user's emails, newsgroup posts, forum posts, etc. as a way of adding a personal touch or including contact details. 

  • The part of a doctor’s prescription containing directions for the patient. 

  • A person's name, written by that person, used as identification or to signify approval of accompanying material, such as a legal contract. 

  • A dish that is characteristic of a particular chef. 

  • A group of four (or a multiple of four) sheets printed such that, when folded, they become a section of a book. 

  • A tuple specifying the sign of coefficients in any diagonal form of a quadratic form. 

  • Data attached to a message that guarantees that the message originated from its claimed source. 

  • An act of signing one's name; an act of producing a signature. 

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