diversity vs unicity

diversity

noun
  • The quality of being diverse or different; difference or unlikeness. 

  • Equal-opportunity inclusion. 

  • A variety; diverse types or examples. 

unicity

noun
  • The state or quality of being unique or one of a kind. 

  • The fact of being united as a whole. 

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