ablutions vs cleaning

ablutions

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

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

cleaning

noun
  • The process of making something clean. 

  • The afterbirth of cows, ewes, etc. 

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