oppression vs tormenting

oppression

noun
  • The act of oppressing, or the state of being oppressed. 

  • The exercise of authority or power in a burdensome, cruel, or unjust manner. 

  • A feeling of being oppressed. 

tormenting

noun
  • The act by which somebody is tormented. 

adj
  • Involving or causing torment. 

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