epithet vs identifier

epithet

noun
  • A term used to characterize a person or thing. 

  • A word in the scientific name of a taxon following the name of the genus or species. This applies only to formal names of plants, fungi and bacteria. In formal names of animals the corresponding term is the specific name. 

  • A term used as a qualifier of the name of a deity in order to designate said deity in a particular aspect or role. 

  • One of many formulaic words or phrases used in the Iliad and Odyssey to characterize a person, a group of people, or a thing. 

  • A term used as a descriptive substitute for the name or title of a person. 

  • An abusive or contemptuous word or phrase. 

verb
  • To term; to refer to as. 

identifier

noun
  • Someone who identifies; a person who establishes the identity of someone or something. 

  • One who identifies as a particular type or role; one who says and believes that they are a certain thing. 

  • A formal name used in source code to refer to a variable, function, procedure, package, etc. or in an operating system to refer to a process, user, group, etc. 

  • A primary key. 

  • A guidebook that helps determine the specific class of an object (such as a mushroom, herb, fish, bird, drug, or mineral), or its individual identity (such as that of a star). 

  • Something that identifies or uniquely points to something or someone else. 

  • A code that distinguishes a particular element from all other elements in a document. 

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