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

[EX Q]: Sentence: 'an elephant with broken tusks stands in front of a hill and boulders'. Find frequency of the letter 'n'
[EX A]: 7

[EX Q]: Sentence: 'some food on plates next to each other on a table'. Find frequency of the letter 'e'
[EX A]: 6

[EX Q]: Sentence: 'a woman sitting on a motorcycle at a biker meeting'. Find frequency of the letter 'm'
[EX A]:
3