bad apple vs sinful

bad apple

noun
  • A person who is not wholesome, honest, or trustworthy, especially one who has an adverse influence on others. 

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 bad apple and sinful occurred in a corpus of books? (source: Google Ngram Viewer )