concurrency vs inappropriateness

concurrency

noun
  • A property of systems where several processes execute at the same time. 

  • A stretch of road that is shared between two or more numbered or named routes. 

  • The property or an instance of being concurrent; something that happens at the same time as something else. 

inappropriateness

noun
  • The quality of being inappropriate; unsuitability. 

  • The result of being inappropriate. 

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