What do you mean?
There is a concept of "time-in-grade" whereby people are expected to be in a position for a certain amount of time before they are promoted. The idea here is that promotion should be the result of sustained performance. That said, these rules aren't usually written down.
In my experience, it takes two years to go from Analyst to Associate and three to four to to from Associate to Vice President. Some people with advanced degrees can come in as Associates and I've seen experienced academics come in as VPs. You very, very rarely see VPs with less than five years of experience.
From there, it's less well-defined, but most people spent at least three to five years as VPs before getting to Director/Principal level.
What often is written down is the performance expectations at each level. We frequently say that someone is "already performing at the VP level." What that means may vary from firm to firm.