dusting vs lavage

dusting

noun
  • A maintenance or comfort behaviour in which a bird flushes fine dirt through the feathers; dust-bathing. 

  • The act of removing dust from the furniture, as a household chore. 

  • A light snowfall. 

  • A light covering of something. 

  • A beating. 

lavage

noun
  • A washing of a hollow organ. 

  • A washing. 

verb
  • To wash a hollow organ 

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