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

[Q]: Sentence: 'a woman holds the reins of a saddled horse'. Find frequency of the letter 'm'
[A]: 1


[Q]: Sentence: 'a man pushing a cart full of bananas'. Find frequency of the letter 'u'
[A]: 2


[Q]: Sentence: 'a man eating a folded slice of pizza'. Find frequency of the letter 'd'
[A]:
2