There are generally three stages of Shani Sade Sati, as per astrology. They are:

1) The first stage is when Shani first enters the sign of Sagittarius. This is when the native may start to experience some problems and challenges in their life.

2) The second stage is when Shani is in the middle of Sagittarius. This is when the native may face the maximum amount of problems and challenges.

3) The third stage is when Shani leaves the sign of Sagittarius. This is when the native may start to see some relief from the problems and challenges they have been facing.