Question: Define a function which takes a character and a histogram and returns the frequency associated with that character in the given histogram. If the character

Define a function which takes a character and a histogram and returns the frequency associated with that character in the given histogram. If the character doesn't appear in the histogram, it should return 0.

So for example, get_freq( 'a', [['B', 1], ['a', 3], ['n', 2], ['!', 1]] ) should return 3 and get_freq( 'X', [['B', 1], ['a', 3], ['n', 2], ['!', 1]] ) should return 0.

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