expurgation vs ghusl

expurgation

noun
  • The act of expurgating, purging, or cleansing; purification from anything noxious, offensive, sinful, or erroneous. 

ghusl

noun
  • A full-body wash taken by Muslims to restore the body to a state of purity. 

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