instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a man playing baseball on a television set'. Find frequency of the letter 'l'
answer:
4


question:
Sentence: 'the skateboarder is jumping over a huge statue of a shoe'. Find frequency of the letter 'i'
answer:
2


question:
Sentence: 'a herd of sheep grazing in an enclosure'. Find frequency of the letter 'l'
answer:

1