healful vs healthy

healful

adj
  • Affording health or salvation. 

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

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

healthy

adj
  • Evincing health. 

  • Enjoying good health; well; free from disease or disorder. 

  • Conducive to health. 

  • Significant, hefty; beneficial. 

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