prognosis vs soothsaying

prognosis

noun
  • A forecast of the future course or outcome of a situation based on what is presently known; a prediction. 

  • A forecast of the future course or outcome of a disease or disorder based on current medical knowledge. 

soothsaying

noun
  • A method of foretelling the future. 

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