formula vs formulary

formula

noun
  • A formulation; a prescription; a mixture or solution made in a prescribed manner; the identity and quantities of ingredients of such a mixture. 

  • Any mathematical rule expressed symbolically. 

  • A symbolic expression of the structure of a compound. 

  • A formal statement of doctrine. 

  • A syntactic expression of a proposition, built up from quantifiers, logical connectives, variables, relation and operation symbols, and, depending on the type of logic, possibly other operators such as modal, temporal, deontic or epistemic ones. 

  • A plan or method for dealing with a problem or for achieving a result. 

formulary

noun
  • A pharmacopoeia or list of available drugs, particularly prescription drugs 

  • A list of formulas; a collection of set forms to be followed, especially in religious belief. 

  • A list of drugs, created by health insurers, hospitals, or prescription drug plans, that defines how costs for any drug are shared between patient and health care provider, typically broken down by tiers such as preferred generics with lowest copay, or preferred brand with higher copay, or non-preferred brand and not covered tiers with the highest cost to the patient. 

  • An ancient or medieval collection of models for official writings. 

  • A collection of formulas in sciences and mathematics. 

adj
  • Stated; prescribed; ritual. 

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