lavage vs steeping

lavage

noun
  • A washing of a hollow organ. 

  • A washing. 

verb
  • To wash a hollow organ 

steeping

noun
  • An instance of something being steeped; a wetting. 

  • A 13th-century coin circulated in Ireland as a debased sterling silver penny, outlawed under King Edward I. 

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