oppression vs wringing

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. 

wringing

noun
  • The act by which something is wrung. 

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