normative vs prescriptive

normative

adj
  • Of or pertaining to a norm or standard. 

  • Conforming to a norm or norms. 

  • Attempting to establish or prescribe a norm. 

noun
  • A regulation imposed to preserve a norm. 

prescriptive

adj
  • Of or pertaining to prescribing or enjoining, especially an action or behavior based on a norm or standard. 

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