damage vs weaken

damage

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. 

noun
  • Cost or expense. 

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

weaken

verb
  • To make weaker or less strong. 

  • To become weaker or less strong. 

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