proscription vs red light

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. 

red light

noun
  • Denial to proceed; a ruling out of any possibility. 

  • A warning light, especially as a traffic signal indicating stop. 

  • A sign of a brothel. 

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