Digit Frequency

1. You are given a number n.
2. You are given a digit d.
3. You are required to calculate the frequency of digit d in number n.

0 <= n <= 10^9
0 <= d <= 9
  

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2. Think of a solution approach, then try and submit the question on editor tab.
3. We strongly advise you to watch the solution video for prescribed approach.

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