long drop vs netty

long drop

noun
  • An outhouse; a pit latrine. 

netty

noun
  • An outhouse: an outbuilding used as a lavatory. 

  • Any other place or fixture used for urination and defecation: a lavatory; a toilet. 

adj
  • Netted: made of or employing a net. 

  • Netlike. 

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