ressentiment vs slow burn

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. 

slow burn

noun
  • A gradually increasing feeling of anger or frustration. 

  • A romantic story (especially a work of fan fiction) in which the central relationship develops slowly. 

adj
  • Developing slowly over the course of the story. 

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