foretoken vs prognostication

foretoken

noun
  • A prognostic; a premonitory sign; warning or presentiment. 

verb
  • To betoken beforehand; prognosticate; foreshadow; give warning of; presage. 

prognostication

noun
  • A statement about or prior knowledge of the future. 

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