mercilessness vs solace

mercilessness

noun
  • The property of being merciless. 

solace

noun
  • Comfort or consolation in a time of loneliness or distress. 

  • A source of comfort or consolation. 

verb
  • To allay or assuage. 

  • To give solace to; comfort; cheer; console. 

  • To take comfort; to be cheered. 

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