Comprehension usually used with of. The meaning of understanding is a mental grasp : Understanding is a relation between the knower and an object of understanding.
What is the 'last touch' rule? AFL coaches not convinced they need it
How to use understanding in a sentence. Knowledge about a subject, situation, etc. Understanding implies abilities and dispositions with respect to an object.
Mental process of a person who comprehends;
Both comprehension and understanding can be used to talk about someone's ability to understand something. He noted bond's apparent lack of. Or about how something works: