fluent vs inarticulate

fluent

adj
  • Able to use a language accurately, rapidly, and confidently – in a flowing way. 

  • That flows; flowing, liquid. 

inarticulate

noun
  • An animal belonging to the subphylum Inarticulata. 

adj
  • not articulated in normal words. 

  • unable to speak with any clarity 

  • speechless 

  • not having joints or other articulations 

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