red rag to a bull vs stimulant

red rag to a bull

noun

  • Something that will enrage another particular person. 

stimulant

noun

  • Something that promotes activity, interest, or enthusiasm. 

  • A substance that acts to increase physiological or nervous activity in the body. 

adj

  • Acting as a stimulant. 

How often have the words red rag to a bull and stimulant occurred in a corpus of books? (source: Google Ngram Viewer )