abdest vs expurgation

abdest

noun
  • The Islamic act of washing parts of the body using water for ritual prayers and for handling and reading the Qur'an. 

expurgation

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

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