laver vs toilet room

laver

noun
  • Where one laves, a washroom, particularly a lavatorium, the washing area in a monastery. 

  • That which laves, particularly a washbasin. 

  • Other seaweeds similar in appearance or use, especially 

  • One who laves: a washer. 

  • A red alga/seaweed, Porphyra umbilicalis (syn. Porphyra laciniata), eaten as a vegetable. 

  • Porphyra vulgaris 

toilet room

noun
  • A room in which to use a toilet: a lavatory. 

  • A room in which to perform one's toilet, including dressing and grooming, particularly before execution. 

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