secrecy vs solitude

secrecy

noun
  • Concealment; the condition of being secret or hidden. 

  • The habit of keeping secrets. 

solitude

noun
  • Aloneness; the state of being alone, solitary, or by oneself. 

  • A lonely or deserted place. 

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