ablutions vs bathhouse

ablutions

noun
  • A building that houses bathing and toilet facilities on a military base. 

  • The location or building where the showers and basins are located. 

bathhouse

noun
  • A building with baths for communal use. 

  • A building where swimmers can change clothes. 

  • A business with bath-like facilities, which chiefly serves as a place for sexual encounters, especially among men. 

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