portent vs presage

portent

noun
  • Something that portends an event about to occur, especially an unfortunate or evil event; an omen. 

  • A portending; significance 

  • Something regarded as portentous; a marvel; prodigy. 

presage

noun
  • A warning of a future event; an omen. 

  • An intuition of a future event; a presentiment. 

verb
  • To make a prediction. 

  • To have a presentiment of; to feel beforehand; to foreknow. 

  • To predict or foretell something. 

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