contravention vs dereliction

contravention

noun
  • The act of contravening a rule, regulation, or law, or of not fulfilling an obligation, promise, or agreement. 

dereliction

noun
  • The act of abandoning something, or the state of being abandoned. 

  • Land gained from the water by a change of water-line. 

  • Willful neglect of one's duty. 

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