not fit to eat vs unwholesome

not fit to eat

unwholesome

adj
  • Not wholesome; unfavorable to health; unhealthful. 

  • Not sound; tainted; defective. 

  • Indicating unsound health; characteristic of or suggesting an unsound condition, physical or mental; repulsive; offensive. 

How often have the words not fit to eat and unwholesome occurred in a corpus of books? (source: Google Ngram Viewer )