metaphysical vs theoretical

metaphysical

adj
  • Of or pertaining to metaphysics. 

  • Being an adherent of the philosophy of metaphysics. 

  • Immaterial, supersensual, not physical (more properly, "beyond" that which is physical). 

theoretical

adj
  • Of or relating to theory; abstract; not empirical. 

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