system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Thor is said to be in his 1500s, while Loki is around 1000. What is the ageing rate of Asgardians, especially when they appeared a similar age in a flashback?

Thor has at least 500 years on Loki, yet the flashback in 'Thor' shows that the former appears only slightly older than the latter. 

Do Asgardians age at an approximately human rate initially, before it slows down significantly, or is their overall ageing much slower? Does Loki being a frost giant mean a different rate of ageing?
gpt
In the comics, Asgardians age about 1 per 100 years - with Thor being around 3000 (30) years old, having been around 2000 (20) years old during the Viking Era. but that doesnt seem to work for the MCU.

I think Frost Giants age around the same rate - or at least Ymir, the leader of the Frost Giants, is easily as old as Odin.