inarticulation vs utterance

inarticulation

noun
  • The state of being inarticulate; inarticulateness. 

  • An inarticulate or underarticulated utterance. 

  • Any point in the educational system in which the development of the individual is hindered. 

utterance

noun
  • Something spoken. 

  • The ability to speak. 

  • A manner of speaking. 

  • An act of uttering. 

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