idiom vs noun

idiom

noun
  • A manner of speaking, a mode of expression peculiar to a language, language family, or group of people. 

  • An artistic style (for example, in art, architecture, or music); an instance of such a style. 

  • An established phrasal expression whose meaning may not be deducible from the literal meanings of its component words. 

  • A programming construct or phraseology that is characteristic of the language. 

  • A language or language variety; specifically, a restricted dialect used in a given historical period, context etc. 

noun

noun
  • A word that functions as the name of a specific object or set of objects, such as person, animal, place, thing, phenomenon, substance, quality, or idea; one of the basic parts of speech in many languages, including English. 

  • An object within a user interface to which a certain action or transformation (i.e., verb) is applied. 

verb
  • To convert a word to a noun. 

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