eye-opener vs tranquilizer

eye-opener

noun
  • A startling or shocking revelation. 

  • A strong alcoholic beverage, especially one consumed in the morning. 

  • Something that causes the eyes to open, or that opens the eyes. 

  • An attractive woman. 

  • Something that provides a sudden insight, or makes something clear that was previously mysterious. 

tranquilizer

noun
  • That which tranquillizes or soothes. 

  • A drug used to reduce anxiety or tension. 

How often have the words eye-opener and tranquilizer occurred in a corpus of books? (source: Google Ngram Viewer )