Seems like it would be an easy thing to do from the OAuth provider's end - in addition to showing the scopes, you can put it into a few easy buckets: 24 hours,

Seems like it would be an easy thing to do from the OAuth provider's end - in addition to showing the scopes, you can put it into a few easy buckets: 24 hours, 7 days, 1 month, 1 year, indefinitely