previsional vs visionary

previsional

adj
  • Relating to prevision or foresight; prophetic. 

visionary

adj
  • prophetic or revelatory 

  • imaginary or illusory 

  • having vision or foresight 

  • idealistic or utopian 

noun
  • Someone who has positive ideas about the future. 

  • An impractical dreamer. 

  • Someone who has visions; a seer. 

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