incommunicable vs preternatural

incommunicable

adj
  • Who does not communicate freely; uncommunicative or reserved 

  • That cannot be communicated or transmitted 

preternatural

adj
  • Beyond or not conforming to what is natural or according to the regular course of things; strange. 

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