sufficiency vs superfluity

sufficiency

noun
  • The quality or condition of being sufficient. 

  • An adequate amount. 

superfluity

noun
  • The quality or state of being superfluous; overflowingness. 

  • Something superfluous, as a luxury. 

  • Collective noun for a group of nuns. 

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