In this task, you are given an input list. A list contains several comma-separated items written within brackets. You need to return the count of all the numerical elements in the given list. Return 0 if no numerical element in the list.
['h', 'K', 'w', '4437', '8083', 'S', '3903', 'O', 'k', 'W', 'n', 'D', '6781', 'o', 'z', '5457', 'o', '8773', 'n', '5053', 'b', '8369', 'B']