culpability vs dereliction

culpability

noun
  • The degree of one's blameworthiness in the commission of a crime or offence. 

dereliction

noun
  • Willful neglect of one's duty. 

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

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

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