foretoken vs prognosticate

foretoken

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

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

prognosticate

verb
  • To predict or forecast, especially through the application of skill. 

  • To presage, betoken. 

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