Answer this question to the best of your ability:
How long should I expect each stage of meditation to last?
The duration of each stage of meditation can vary greatly depending on factors such as your experience level, the technique you're using, and your personal inclinations. As a beginner, you might spend more time in the preparatory and concentration stages, while advanced practitioners may move more quickly through these early stages and spend more time in deepening, unification, and transformation/insight stages.

Generally speaking, the concentration stage might last from a few minutes to around 20 minutes, depending on your focus and practice style. The deepening stage can last anywhere from a few moments to half an hour or longer. The unification and transformation/insight stages may be quite brief or extend for the majority of your session.

Remember that meditation is not a race, and it's more important to focus on the quality of your practice rather than how long each stage lasts. With consistent practice, you will likely find that the time spent in each stage evolves over time.