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

[EX Q]: Sentence: 'a woman is looking at sheep off in a field'. Find frequency of the letter 'm'
[EX A]: 1

[EX Q]: Sentence: 'several zebras  and a giraffe in an enclosure'. Find frequency of the letter 's'
[EX A]: 3

[EX Q]: Sentence: 'a girl surfing along a wave in the ocean'. Find frequency of the letter 'o'
[EX A]:
2