aspirin vs xylazine

aspirin

noun
  • an analgesic drug, acetylsalicylic acid 

  • a tablet containing this substance 

xylazine

noun
  • A potent α₂-adrenergic agonist used for sedation, anesthesia, and analgesia in large mammals; it is also misused as an adulterant in street drugs. 

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