mismatch vs synchronism

mismatch

verb
  • To match unsuitably; to fail to match 

noun
  • Something that does not match; something dissimilar, inappropriate or unsuitable. 

synchronism

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

  • A temporal relationship between events. 

  • The state of being synchronous. 

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