a bit much vs so much

a bit much

noun
  • More than is reasonable; a bit too much. 

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 a bit much and so much occurred in a corpus of books? (source: Google Ngram Viewer )