novelty vs unprecedentedness

novelty

noun
  • A new product; an innovation. 

  • A small mass-produced trinket. 

  • The state of being new or novel; newness. 

  • In novelty theory, newness, density of complexification, and dynamic change as opposed to static habituation. 

  • An opening move played for the first time ever (in high-level chess). 

adj
  • Meant primarily for display rather than functional use. Handheld items are often impractically large. 

unprecedentedness

noun
  • Quality of being unprecedented. 

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