inviting vs unattractive

inviting

noun
  • invitation 

adj
  • Alluring; tempting; attractive. 

unattractive

adj
  • Not handsome or beautiful or appealing. 

  • Lacking the power to attract interest. 

noun
  • An aesthetically unattractive person 

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