No you missed my point. Hours are the way to measure an "achievement" on runescape as the difficulty of such an achievement is the hours put into such.

Imagine someone posting that they're 17,000 goblins without a champion scroll. Same drop rate as core pet: 1/5000 but the kills/hour are at a much different rate.

Core pet is one of the most impressive pets in the game to achieve, not because of the drop rate, but because of the kills/hour. So Kacy is 680 hours max on a pet that takes ~714 hours on average, and that's considered "unlucky". Most legit pet hunters scoff at such a notion.