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.
['y', '4551', 'g', '5729', '9089', 'N', 'r', 'I', 'a', 'k', '5837', 'U', 'q', '55', '1457', 'Z', '1909', '9593', '9721', 'Z']