ill-looking vs unhealthy

ill-looking

adj
  • having an unhealthy appearance 

  • unattractive; ugly 

  • of evil or sinister appearance 

unhealthy

adj
  • characterized by, or conducive to poor health 

  • characterized by disturbed mental health 

  • tending to corrupt 

  • sick or ill 

How often have the words ill-looking and unhealthy occurred in a corpus of books? (source: Google Ngram Viewer )