less vs so much

less

adv
  • To a smaller extent or degree. 

  • Used for constructing syntactic diminutive comparatives of adjectives and adverbs. 

prep
  • Minus; not including 

det
  • Fewer; a smaller number of. 

  • A smaller amount of; not as much. 

noun
  • A smaller amount or quantity. 

conj
  • unless 

so much

adv
  • To a certain degree or extent 

adj
  • To such a quantity, degree etc. 

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

  • A demonstrated amount. 

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