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.
['o', 's', '9905', 'm', 'K', 'D', 'W', '5137', '1815', '6451', 'u', 'H', 'I', '9497', '6957', 'z', 'l', 'Q']