concurrence vs shrinking

concurrence

noun
  • An instance of simultaneous occurrence. 

  • Agreement; concurring. 

shrinking

adj
  • Shy and retiring. 

noun
  • The act of one who, or that which, shrinks; act of becoming smaller or moving timidly away. 

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