downer vs sedative

downer

noun
  • A drug that has depressant qualities. 

  • A livestock animal that has collapsed. 

  • A negative drug trip. 

  • A form of industrial action in which workers down tools and refuse to work. 

  • Something or someone disagreeable, dispiriting or depressing; a killjoy. 

sedative

noun
  • An agent or drug that sedates, having a calming or soothing effect, or inducing sleep. 

adj
  • Calming, soothing, inducing sleep, tranquilizing 

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