membership vs solitude

membership

noun
  • The state of being a member of a group or organization. 

  • The body of members of an organization. 

  • The fact of being a member of a set. 

solitude

noun
  • A lonely or deserted place. 

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

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