painful vs salutary

painful

adj
  • Afflicted or suffering with pain (of a body part or, formerly, of a person). 

  • Very bad, poor. 

  • Causing pain or distress, either physical or mental. 

  • Requiring effort or labor; difficult, laborious. 

salutary

adj
  • Effecting or designed to effect an improvement; remedial: salutary advice. 

  • Promoting good health and physical well-being; wholesome; curative. 

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