comforter vs foe

comforter

noun
  • A pacifier. 

  • A person who comforts someone who is suffering. 

  • A padded cover for a bed, duvet, continental quilt. 

foe

noun
  • An enemy. 

  • A unit of energy equal to 10⁴⁴ joules. 

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