‘continuous’ or ‘continual’?

Many learners use continuous and continual interchangeably. But actually they are different in meaning.

Continuous indicates duration without interruption.

Example:

Continuous monitoring of the patient’s condition proved crucial in his treatment.

Continual indicates duration that continues over a long period of time, but with intervals of interruption.

Example: 

The continual street repairs disrupted traffic for nearly two years.