herbal tea vs intravenous

herbal tea

noun
  • A beverage made by infusing the leaves of various herbs, generally not including true tea (Camellia sinensis). 

intravenous

noun
  • A dose of medicine administered from a drip, down through a hollow needle inserted into a patient's vein. 

adj
  • Inside the veins. 

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