compound vs put salt on the wound

compound

noun
  • A substance formed by chemical bonding of two or more elements in definite proportions by weight. 

  • An enclosure for secure storage. 

  • An enclosure within which workers, prisoners, or soldiers are confined. 

  • A lexeme that consists of more than one stem or an affix, e.g. bookshop, high school or non-standard. 

  • A group of buildings situated close together, e.g. for a school or block of offices. 

  • Anything made by combining several things. 

  • A compound locomotive, a steam locomotive with both high-pressure and low-pressure cylinders. 

  • A lexeme that consists of more than one stem. 

adj
  • Composed of elements; not simple. 

  • An octave higher than originally (i.e. a compound major second is equivalent to a major ninth). 

  • Dealing with numbers of various denominations of quantity, or with processes more complex than the simple process. 

verb
  • To form (a resulting mixture) by combining different elements, ingredients, or parts; to mingle with something else. 

  • To settle by agreeing on less than the claim, or on different terms than those stipulated. 

  • To worsen a situation. 

  • To come to terms of agreement; to settle by a compromise. 

  • Of a horse: to fail to maintain speed. 

  • To settle amicably; to adjust by agreement. 

  • To increase in value with interest, where the interest is earned on both the principal sum and prior earned interest. 

put salt on the wound

How often have the words compound and put salt on the wound occurred in a corpus of books? (source: Google Ngram Viewer )