healful vs sanatory

healful

adj
  • Tending or serving to heal; health-promoting; healing. 

  • Full of health or safety; healthy; whole; sound; safe. 

  • Affording health or salvation. 

sanatory

adj
  • producing health; healing or curative 

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