forewarn vs predict

forewarn

verb
  • To warn in advance. 

predict

verb
  • To imply. 

  • To make predictions. 

  • To make a prediction: to forecast, foretell, or estimate a future event on the basis of knowledge and reasoning; to prophesy a future event on the basis of mystical knowledge or power. 

  • To direct a ranged weapon against a target by means of a predictor. 

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