inarticulate vs tacit

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. 

tacit

adj
  • Implied, but not made explicit, especially through silence. 

  • Not derived from formal principles of reasoning; based on induction rather than deduction. 

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