inarticulate vs smooth operator

inarticulate

adj
  • not articulated in normal words. 

  • unable to speak with any clarity 

  • speechless 

  • not having joints or other articulations 

noun
  • An animal belonging to the subphylum Inarticulata. 

smooth operator

noun
  • A person who accomplishes tasks with efficiency and grace, especially one with verbal skills who is persuasive in interpersonal relationships, negotiation, etc. 

  • A skillful, manipulative person, con artist, or clever scoundrel. 

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