dissatisfaction vs ressentiment

dissatisfaction

noun
  • the cause of such feelings 

  • unhappiness or discontent 

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 dissatisfaction and ressentiment occurred in a corpus of books? (source: Google Ngram Viewer )