salutary vs sound as a barrel

salutary

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

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

sound as a barrel

adj
  • healthy, enjoying good health 

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