ghusl vs purgation

ghusl

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

purgation

noun
  • The process or act of cleansing from sin or guilt. 

  • The process or act of purging, such as by the use of a purgative. 

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