minimal vs not much

minimal

noun
  • Something very small; a tiny part or fragment. 

adj
  • Characterised by the use of simple form or structures. 

  • Characterised by the repetition and gradual alteration of short phrases. 

  • The smallest possible amount, quantity, or degree. 

not much

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