peculiarity vs unprecedentedness

peculiarity

noun
  • The quality or state of being peculiar; individuality; singularity. 

  • Exclusive possession or right. 

  • That which is peculiar; a special and distinctive characteristic or habit; particularity. 

unprecedentedness

noun
  • Quality of being unprecedented. 

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