Your understanding might be that your mother will always drive you to school if you miss the bus. Understanding a concept means you get it. Knowledge about a subject, situation, etc.
Hauptbahnhof, Dortmund, NordrheinWestfalen, Deutschland Stock Photo
Comprehension usually used with of. Understanding is a relation between the knower and an object of understanding. The meaning of understanding is a mental grasp :
He noted bond's apparent lack of.
Or about how something works: Both comprehension and understanding can be used to talk about someone's ability to understand something. How to use understanding in a sentence. Understanding implies abilities and dispositions with respect to an object.