anxiolytic vs downer

anxiolytic

noun
  • A drug prescribed for the treatment of symptoms of anxiety. 

adj
  • That reduces anxiety; tranquilizing 

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. 

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