dampen vs lavage

dampen

verb
  • To make damp or moist; to make moderately wet. 

  • To lessen; to dull; to make less intense (said of emotions and non-physical things). 

  • To become damped or deadened. 

  • To become damp or moist. 

lavage

verb
  • To wash a hollow organ 

noun
  • A washing. 

  • A washing of a hollow organ. 

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