lavage vs soak up

lavage

verb
  • To wash a hollow organ 

noun
  • A washing. 

  • A washing of a hollow organ. 

soak up

verb
  • To absorb or draw in a substance, especially all of that substance 

  • To absorb or deflect a series of actions; to endure a behavior from someone. 

  • To enjoy some effects. 

  • To learn, especially passively or eagerly; to allow an experience to affect oneself 

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