inexactness vs non sequitur

inexactness

noun
  • The characteristic or quality of being inexact; a lack of precision, accuracy, or certainty. 

non sequitur

noun
  • Any invalid argument in which the conclusion cannot be logically deduced from the premises. 

  • A kind of pun that uses a change of word, subject, or meaning to make a joke of the listener’s expectation. 

  • Any abrupt and inexplicable transition or occurrence. 

  • A statement that does not logically follow a statement that came before it. 

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