plenty vs sufficiency

plenty

noun
  • A more-than-adequate amount. 

det
  • much, enough 

  • many 

adv
  • More than sufficiently. 

  • Used as an intensifier, very. 

pron
  • More than enough. 

sufficiency

noun
  • An adequate amount. 

  • The quality or condition of being sufficient. 

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