plenty vs so much

plenty

noun
  • A more-than-adequate amount. 

det
  • much, enough 

  • many 

pron
  • More than enough. 

adv
  • More than sufficiently. 

  • Used as an intensifier, very. 

so much

noun
  • A particular amount, often a large or excessive amount. 

  • A demonstrated amount. 

adv
  • To a certain degree or extent 

adj
  • To such a quantity, degree etc. 

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