desynchronization vs synchronicity

desynchronization

noun
  • The loss or absence of synchronization; asynchronism. 

  • A loss of synchronization of brain waves. 

synchronicity

noun
  • The state of being synchronous or simultaneous. 

  • Coincidences that seem to be meaningfully related; supposedly the result of "universal forces". 

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