Yes, because my math was bad, apologies. The point is one the same, because ultimately it will be up to you how long it will take to memorize the patterns and techniques, how to do them, and where. In the end, it is in your hands if it takes 3 months, or 4 years. Master Khan was the former, and spent over a decade befoire testing for 2nd dan. It's in the eye of the beholder and it was an inadequately done example.