not much vs something

not much

something

verb
  • Applied to an action whose name is forgotten by, unknown or unimportant to the user, e.g. from words of a song. 

noun
  • An object whose name is forgotten by, unknown or unimportant to the user, e.g., from words of a song. Also used to refer to an object earlier indefinitely referred to as 'something' (pronoun sense). 

  • An object whose nature is yet to be defined. 

adj
  • Having a characteristic that the speaker cannot specify. 

pron
  • Somebody who or something that is superlative or notable in some way. 

  • A quality to a moderate degree. 

  • An uncertain or unspecified thing; one thing. 

  • A talent or quality that is difficult to specify. 

adv
  • Used to adverbialise a following adjective 

  • Somewhat; to a degree. 

How often have the words not much and something occurred in a corpus of books? (source: Google Ngram Viewer )