proscription vs refusal

proscription

noun
  • A decree or law that prohibits. 

  • Decree of condemnation toward one or more persons, especially in the Roman antiquity. 

  • A prohibition. 

  • The act of proscribing, or its result. 

refusal

noun
  • The act of refusing. 

  • Depth or point at which well or borehole drilling cannot continue. 

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