Platonist vs visionary

Platonist

noun
  • One who holds similar beliefs, particularly that abstract ideas are real. 

  • A member of the philosophical school of thought established by Plato; a believer in Platonism. 

visionary

noun
  • Someone who has positive ideas about the future. 

  • An impractical dreamer. 

  • Someone who has visions; a seer. 

adj
  • imaginary or illusory 

  • having vision or foresight 

  • idealistic or utopian 

  • prophetic or revelatory 

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