charming vs unappealing

charming

noun
  • The casting of a magical charm. 

adj
  • Pleasant, charismatic. 

  • Delightful in a playful way which avoids responsibility or seriousness, as if attracting through a magical charm. 

unappealing

adj
  • Not appealing 

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