Natural speed please (:
When you try to memorize by inserting memories, things don’t stick until you try to recall them. Have you ever found that after you take a test at school, you suddenly know more about the test subject than you did when you started the test? This is because you’re forcing yourself to recall information, in the process creating greater and thicker neural pathways to that memory. By recalling it, you’re telling your brain that it’s important, so it’ll then take the time to make the memory easier to retrieve for next time.
hope this helps