Sands of Time Path of Exile 2 game term
Sands of Time grants 60% increased Skill Speed, scaling down to 1% over 10 seconds, at which point it will then scale back up to 60%. It also grants 1% increased Area of Effect, scaling up to 60% over 10 seconds, at which point it will then scale back down to 1%.
The game's own definition, as shown when you hover the term in game.
Game data: Path of Exile 2 client · How we source this
Sands of Time grants 60% increased Skill Speed, scaling down to 1% over 10 seconds, at which point it will then scale back up to 60%. It also grants 1% increased Area of Effect, scaling up to 60% over 10 seconds, at which point it will then scale back down to 1%.