mention vs soliloquize

mention

verb
  • To utter a word or expression in order to refer to the expression itself, as opposed to its usual referent. 

  • To make a short reference to something. 

noun
  • A speaking or notice of anything, usually in a brief or cursory manner. Used especially in the phrase make mention of. 

  • A social media feed, a list of replies or posts mentioning a person. 

soliloquize

verb
  • To perform a soliloquy; (of a character) to talk to oneself. 

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