Answer: There is no limit on ascents and descents. They should reach a special intensity in frequency and magnitude. The intensity of the ascents and descents depends on their height multiplied by the frequency. Both the height and the intensity are important.
The height and the intensity bring a person to the level of feeling that everything that happens to him, even in the lowest state, actually comes from the Creator.
A person locks on the Creator in that state, and for the first time ascends to the level of faith above reason.
Keter is faith, and my state in Malchut is knowledge.
From the Kabbalah Lesson in Russian 5/15/16