toilet vs women's room

toilet

noun
  • A room or enclosed area containing a fixture used for urination and defecation (i.e. a toilet (sense 2)): a bathroom or water closet. 

  • A very shabby or dirty place. 

  • A fixture used for urination and defecation, particularly one with a large bowl and ring-shaped seat which uses water to flush the waste material into a septic tank or sewer system. 

  • A small secondary lavatory having a fixture used for urination and defecation (i.e. a toilet (sense 2)) and sink but no bathtub or shower. 

verb
  • To use the toilet. 

  • To assist another (a child, etc.) in using the toilet. 

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 toilet and women's room occurred in a corpus of books? (source: Google Ngram Viewer )