butt-ugly vs ghastly

butt-ugly

adj

  • Extremely ugly. 

ghastly

adj

  • Extremely bad. 

  • Like a ghost in appearance; death-like; pale; pallid; dismal. 

  • Horrifyingly shocking. 

adv

  • In a ghastly manner. 

How often have the words butt-ugly and ghastly occurred in a corpus of books? (source: Google Ngram Viewer )