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

[Q]: Sentence: 'a white and blue plate topped with meat and a salad'. Find frequency of the letter 'u'
[A]: 1


[Q]: Sentence: 'two indian women in colorful garb standing barefoot with two indian men'. Find frequency of the letter 'd'
[A]: 3


[Q]: Sentence: 'a couple of horse that is next to a cow'. Find frequency of the letter 'e'
[A]:
3