shithouse vs thunderbox

shithouse

noun
  • An outhouse, an outbuilding used as a lavatory 

  • A coward: one who is overly fearful or timid. 

  • A filthy place. 

verb
  • To engage in persistent unsporting behaviour or gamesmanship; to play in a cynical, ugly manner; to cheat without being punished. 

adj
  • Of poor quality. 

thunderbox

noun
  • Any lavatory or toilet, especially a rudimentary outdoor latrine or toilet, or an outhouse. 

  • A box of metal balls which is shaken to create a thunder sound effect. 

  • A chamber pot enclosed in a box; a portable commode. 

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