Only a few minutes from a skilled chiropractor. However, some patients have tense muscles and before a successful restoration of mobility of a joint will take soft tissue work, and that is what could take a while (to calm down muscles).
But why calm them down? If a muscle is tight or tense, also known as guarding, it does not want to let whatever it is attached to move. Imagine trying to remove something out of a closed fist, you might be able to get it out with alot of effort, but have a significantly better chance if you get the fist to open. Similar idea with tight muscles - it’ll be easier and more effective to move once they are loose.