ill feeling vs ressentiment

ill feeling

noun
  • A feeling of animosity or resentment. 

ressentiment

noun
  • A sense of resentment arising from suppressed feelings of envy and hatred, often leading to a frustrated sense of inferiority, with various social repercussions. 

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