discouraging vs foiling

discouraging

noun
  • discouragement 

adj
  • that causes discouragement 

foiling

noun
  • The act by which something is foiled; prevention of success. 

  • A foil. 

  • The track of game, such as deer, in the grass. 

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