Does it sound natural enough?

Let me know if you’re short on time and can’t read it right now.

I’ve never heard the expression ‘short on time’ before. Is it commonly used?

Question

Does it sound natural enough?

Let me know if you’re short on time and can’t read it right now.

I’ve never heard the expression ‘short on time’ before. Is it commonly used?

Answer

Yes, it's a very common expression and sounds totally natural in this context! "Short on" is a prepositional phrase that suggests a lack of a necessary resource. You can be "short on" lots of things--money, patience, space, energy, etc...

It's definitely idiomatic, so it makes sense that it would be confusing.