as balls vs as hell

as balls

adv
  • To a great extent or degree; very. 

as hell

adv
  • To a great extent or degree; very. 

  • 2004, Teralee E. M. Bird, Seraphim Trilogy Book One; What the Herald Angel Sang 

  • Even though he was frightened for them, even though he was scared as hell to fail them, it felt so good to know these people cared when he hurt! 

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