damage vs duty

damage

noun
  • Injury or harm; the condition or measure of something not being intact. 

  • Cost or expense. 

verb
  • To impair the soundness, goodness, or value of; to harm or cause destruction. 

  • To remove a damaged or unsalable item from the sales floor for processing. 

duty

noun
  • The state of being at work and responsible for or doing a particular task. 

  • That which one is morally or legally obligated to do. 

  • A tax placed on imports or exports; a tariff. 

  • The efficiency of an engine, especially a steam pumping engine, as measured by work done by a certain quantity of fuel; usually, the number of pounds of water lifted one foot by one bushel of coal (94 lbs. old standard), or by 1 cwt. (112 lbs., England, or 100 lbs., United States). 

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