ablutions vs drenching

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. 

drenching

noun
  • The act by which something is drenched; a soaking. 

  • The administering of a medicinal draught to an animal. 

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