netty vs women's room

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. 

women's room

noun
  • Synonym of ladies' room: a public lavatory intended for women. 

  • A waiting room in a railway station or other public building intended exclusively for women and usually including a separate women's lavatory. 

How often have the words netty and women's room occurred in a corpus of books? (source: Google Ngram Viewer )