This is always a challenging question to answer because the real answer is "it depends."
Bring gentle contact and movement to each point for as long as it feels "right" to you and your client. It depends on your client at that particular moment. Trust the skill you already have in contacting the body - and then modify it along the way by asking your client about their experience: "Is the contact still feeling helpful? Is it deep enough or too light? Is there too much motion or not enough?" This type of communication with your client is extremely important.
With practice, you will be able to synchronize your contact, pressure, and the amount of time with ease for each person you work with.