ivory tower vs secludedness

ivory tower

noun
  • A sheltered, overly-academic existence or perspective, implying a disconnection or lack of awareness of reality or practical considerations. 

adj
  • Separated from reality and practical matters; overly academic. 

secludedness

noun
  • The quality or state of being secluded. 

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