Special Relativity. Lifetime.

[John 6IX Breezy]

You're conflating frequency with velocity.

Boru

I don't think I am; otherwise I wouldn't have asked to compare them. They both appear to measure the amount of something over a specified time. Thus why the adjectives fast and slow can be used to describe both. My question, more properly, asks if both types of fastness have a function in SR.

Perhaps I should have initially asked if Hz functions as a type of "fastness" instead of a type of velocity; either way the vocabulary seems limited to properly state the question.