Difference between Intercalation and Embolism

What is the difference between Intercalation and Embolism?

Intercalation as a noun is a period inserted into a calendar as in a leap year. while Embolism as a noun is an obstruction or occlusion of an artery by an embolus, that is by a blood clot, air bubble or other matter that has been transported by the blood stream.

We hope you now know whether to use Intercalation or Embolism in your sentence.