As a patent agent, 240 cases will be completed in one year. Some institutions may require agents to work overtime to write cases, and may require agents to write 20 cases, or 30 cases per month. Generally, the requirements are higher every month.
Few people can do it directly unless they are particularly experienced or have a special plan in time planning. So there are about ten cases written by agents who have studied for half a year, and the probability is about below ten.