edulcorate vs lavage

edulcorate

verb

  • To free from acidity. 

  • To sweeten. 

  • To make more acceptable or palatable. 

lavage

verb

  • To wash a hollow organ 

noun

  • A washing. 

  • A washing of a hollow organ. 

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