repression vs smothering

repression

noun
  • The act of repressing; state of being repressed. 

  • The involuntary rejection from consciousness of painful or disagreeable ideas, memories, feelings, or impulses. 

smothering

noun
  • The act by which someone or something is smothered. 

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