Python - Frequency of K in sliced String
Given a String, find the frequency of certain characters in the index range. Input : test_str = 'geeksforgeeks is best for geeks', i = 3, j = 9, K = 'e' Output : 0 Explanation : No occurrence of 'e' between 4th [s] and 9th element Input : test_str = 'geeksforgeeks is best for geeks', i = 0, j = 9, K