lavage vs scrubbing

lavage

noun

  • A washing. 

  • A washing of a hollow organ. 

verb

  • To wash a hollow organ 

scrubbing

noun

  • An act of cleaning in which something is scrubbed. 

  • The removal of impurities from gas. 

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