clinician vs therapeutist

clinician

noun
  • Any healthcare practitioner working at the point of care, in clinical practice (e.g., physicians in clinical medicine, nurses in nursing practice, or allied health providers in practice). 

therapeutist

noun
  • Someone who studies, works with, or uses therapeutics; a therapist. 

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