synchronism vs usual

synchronism

noun
  • The state of being synchronous. 

  • The tabular arrangement of contemporary events etc. in history. 

  • A temporal relationship between events. 

usual

noun
  • The typical state of something, or something that is typical. 

  • A specific good or service (e.g. a drink) that someone typically orders. 

adj
  • Most commonly occurring; typical. 

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