interrelationship vs interruption

interrelationship

noun
  • A relationship between multiple things. 

adj
  • Between multiple relationships; interrelation 

interruption

noun
  • The act of interrupting, or the state of being interrupted. 

  • A time interval during which there is a cessation of something. 

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