cleansing vs lavage

cleansing

noun

  • The process of removing dirt, toxins etc. 

adj

  • That cleanses. 

lavage

noun

  • A washing of a hollow organ. 

  • A washing. 

verb

  • To wash a hollow organ 

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