The hyperboles are:
Vaster than empires and more slow;
An hundred years should go to praise
Thine eyes, and on thy forehead gaze;
Two hundred to adore each breast,
But thirty thousand to the rest;
An age at least to every part,
The hyperboles serve to show how big the love for his mistress is, in putting it on measurable but impposible terms like vaster than empires or hundreds of years