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

[EX Q]: Sentence: 'man sitting on the side of a van playing the guitar'. Find frequency of the letter 'm'
[EX A]: 1

[EX Q]: Sentence: 'a tower with some bright lights and clocks on it'. Find frequency of the letter 'h'
[EX A]: 3

[EX Q]: Sentence: 'there are a man and a horse inside of the barn'. Find frequency of the letter 'i'
[EX A]:
2