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.
['5875', '8429', '8629', '3409', 'a', 'Z', 'O', 'Z', 'C', 'f', '243', 'V', 'h', 'f', '8533', 'K', 'X', '1443', 'n', '7891']