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

[EX Q]: Sentence: 'a golden haired dog looking out of an open window'. Find frequency of the letter 'd'
[EX A]: 4

[EX Q]: Sentence: 'a large grass pasture land with sheep grazing on grass'. Find frequency of the letter 'a'
[EX A]: 7

[EX Q]: Sentence: 'people walk along a path or over a bridge near a river, palm trees, and building'. Find frequency of the letter 'i'
[EX A]:
4