In this task, you need to count the number of times the given letter appears in the given sentence.

[EX Q]: Sentence: 'a birthday cake with a number one and three candle'. Find frequency of the letter 'w'
[EX A]: 1

[EX Q]: Sentence: 'a lady is standing near a luggage stand at the air port'. Find frequency of the letter 'a'
[EX A]: 9

[EX Q]: Sentence: 'a young boy is smiling and holding a baseball bat'. Find frequency of the letter 'a'
[EX A]:
6