god-awful vs rueful

god-awful

adj
  • Extremely awful, unpleasant or dreadful. 

rueful

adj
  • Bad; woeful; deplorable. 

  • Inspiring pity or compassion. 

  • Causing, feeling, or expressing regret or sorrow, especially in a wry or humorous way. 

How often have the words god-awful and rueful occurred in a corpus of books? (source: Google Ngram Viewer )