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

[Q]: Sentence: 'a sheep in a field in front of other sheep'. Find frequency of the letter 'f'
[A]: 3

[Q]: Sentence: 'the skateboarder is jumping over a huge statue of a shoe'. Find frequency of the letter 'i'
[A]: 2

[Q]: Sentence: 'a wide angle view of the kitchen work area'. Find frequency of the letter 'i'
[A]:
3