normative vs præscriptive

normative

adj
  • Conforming to a norm or norms. 

  • Attempting to establish or prescribe a norm. 

  • Of or pertaining to a norm or standard. 

noun
  • A regulation imposed to preserve a norm. 

præscriptive

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