god-awful vs mournful

god-awful

adj
  • Extremely awful, unpleasant or dreadful. 

mournful

adj
  • Filled with grief or sadness; being in a state in which one mourns. 

  • Fit to inspire mourning; tragic. 

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