[jasode]

>I've never once in my life heard of infrequently accessed cache items as "long-tail".

The parent poster wrote "long tail _domains_" and not cache items: https://news.ycombinator.com/item?id=29036188

You also used the word "domains" when you asked about "infrequently used domains" and that's the context I was responding to. I didn't say that cache items are labeled "long tail".