It depends on the total agency fee or gross profit or net profit.
As for how much you can write in a month. ...
A high-level student may write ten a day.
If the level is low, it may not be written for two days.
I mean the utility model.
There is also the customer factor, which depends on the communication efficiency between agents and customers.
patent for invention ...
Writing an invention patent, one can be finished in two days, and that is a master.