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

[Q]: Sentence: 'an elephant has taken a man's hat in its trunk'. Find frequency of the letter 'p'
[A]: 1

[Q]: Sentence: 'a herd of horses standing next to each other on a field'. Find frequency of the letter 'r'
[A]: 3

[Q]: Sentence: 'the baby is sitting on the couch with glasses'. Find frequency of the letter 'y'
[A]:
1