dumbshit vs sad sack

dumbshit

noun

  • A stupid person. 

adj

  • (of a person) Stupid, or prone to making mistakes. 

sad sack

noun

  • An incompetent or inept person. 

  • A perennial failure or victim of misfortune. 

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