bolus vs pastille

bolus

noun
  • A single, large dose of a drug, especially one in that form. 

  • A round mass of something, especially of chewed food in the mouth or alimentary canal. 

verb
  • To take a bolus (dose) of insulin at a mealtime in order to control one's blood glucose level in diabetes. 

  • To administer (a drug) in bolus dosing, that is, dosing in (one or more) boluses. 

pastille

noun
  • A medicinal pill, originally made of compressed herbs. 

  • An often round and somewhat flat flavoured candy or sweet. 

  • Any small, usually round and somewhat flat, granular piece of material; a tablet. 

  • A candy- or sweet-like lozenge, which, when sucked, releases substances that soothe a sore throat, and sometimes vapours to help unblock the nose or sinuses. 

  • A small pellet containing aromatic substances, burned to diffuse a fragrance or to disinfect or fumigate. 

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