ablutions vs scrubbing

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. 

scrubbing

noun
  • The removal of impurities from gas. 

  • An act of cleaning in which something is scrubbed. 

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