nonuniformity vs uniformity

nonuniformity

noun
  • The condition of being nonuniform 

  • A nonuniform thing 

uniformity

noun
  • The absence of alternatives or diversity; sameness. 

  • The state of being uniform, alike and lacking variety. 

  • A collection of identical things 

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