instance vs practice

instance

noun
  • Occasion; order of occurrence. 

  • A specific occurrence of something that is created or instantiated, such as a database, or an object of a class in object-oriented programming. 

  • A case offered as an exemplification or a precedent; an illustrative example. 

  • A dungeon or other area that is duplicated for each player, or each party of players, that enters it, so that each player or party has a private copy of the area, isolated from other players. 

  • An individual copy of such a dungeon or other area. 

  • One of a series of recurring occasions, cases, essentially the same. 

verb
  • To mention as a case or example; to refer to; to cite 

  • To cite an example as proof; to exemplify. 

practice

noun
  • An organized event for the purpose of performing such repetition. 

  • A customary action, habit, or behaviour; a manner or routine. 

  • The ongoing pursuit of a craft or profession, particularly in medicine or the fine arts. 

  • Actual operation or experiment, in contrast to theory. 

  • A place where a professional service is provided, such as a general practice. 

  • The observance of religious duties that a church requires of its members. 

  • The form, manner, and order of conducting and carrying on suits and prosecutions through their various stages, according to the principles of law and the rules laid down by the courts. 

  • Skilful or artful management; dexterity in contrivance or the use of means; stratagem; artifice. 

  • Repetition of an activity to improve a skill. 

  • A easy and concise method of applying the rules of arithmetic to questions which occur in trade and business. 

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