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

[Q]: Sentence: 'the man is holding a plastic sled with snow in it next to a child'. Find frequency of the letter 'g'
[A]: 1


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


[Q]: Sentence: 'two women on horses surrounded a three men one of them talking a picture'. Find frequency of the letter 'e'
[A]:
9