mispronunciation vs utterance

mispronunciation

noun
  • A mispronounced word or phrase. 

  • The act of mispronouncing. 

utterance

noun
  • Something spoken. 

  • The ability to speak. 

  • A manner of speaking. 

  • An act of uttering. 

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