dreamer vs metaphysicist

dreamer

noun
  • Someone whose beliefs are far from realistic. 

  • One who dreams. 

  • swallow-wing puffbird (Chelidoptera tenebrosa) 

  • Any anglerfish of the family Oneirodidae. 

metaphysicist

noun
  • A metaphysician. 

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