salt of the earth vs sinful

salt of the earth

noun
  • A decent, dependable, unpretentious person. 

sinful

adj
  • Constituting a sin; morally or religiously wrong; wicked; evil 

  • Having sinned; guilty of sin. 

  • decadent (luxuriously self-indulgent) 

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