ablutions vs lustration

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. 

lustration

noun
  • A rite of purification, especially washing. 

  • The restoration of credibility to a government by the purging of perpetrators of crimes committed under an earlier regime. 

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