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.
['r', '4451', 'Z', 'S', '6153', 'p', 'i', 'y', 'N', 'b', '8883', '5915', '7667', '7421', 'H', 't', 'o', 'U', 'J', 'Q', 'D', '8297', 'w']