metonym vs pronoun

metonym

noun
  • A word that names an object from a single characteristic of it or of a closely related object; a word used in metonymy. 

  • A concept, idea, or word used to represent, typify, or stand in for a broader set of ideas. 

pronoun

noun
  • A type of word that refers anaphorically to a noun or noun phrase, but which cannot ordinarily be preceded by a determiner and rarely takes an attributive adjective. 

  • Any of the pronouns by which a person prefers to be described, typically reflecting gender identity. 

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