precognition vs sixth sense

precognition

noun
  • Knowledge of the future; understanding of something in advance, especially as a form of supernatural or extrasensory perception. 

  • The practice of taking a factual statement from a witness before a trial. 

sixth sense

noun
  • Extrasensory perception; the ability to sense things by means other than the known bodily senses. 

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