mysticism vs occultism

mysticism

noun
  • The beliefs, ideas, or thoughts of mystics. 

  • A transcendental union of soul or mind with the divine reality or divinity. 

  • A doctrine of direct communication or spiritual intuition of divine truth. 

  • Obscure thoughts and speculations. 

occultism

noun
  • A belief in occult powers and the hope of controlling them 

  • The study of the supernatural 

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