pathfinder 1e – Persistence Inquisition Relentless Footing duration

The Persistence Inquisition grants the Relentless Footing ability:

Relentless Footing (Ex): As a swift action, you can add 10 feet to your land speed. This increase counts as an enhancement bonus, and it affects your jumping distance as normal for increased speed. You can use this ability a number of times per day equal to 3 + your Wisdom bonus (minimum 1).

The description does not say how long the enhancement lasts. How long does this effect last?