temazepam vs xylazine

temazepam

noun
  • A compound (trademark Restoril) of the benzodiazepine class used as a tranquilizer and short-acting hypnotic. 

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 temazepam and xylazine occurred in a corpus of books? (source: Google Ngram Viewer )