dereliction vs discarding

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. 

discarding

noun
  • The act by which something is discarded; a throwing away. 

  • Discarded material. 

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