instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'many different species of sheep in display at a museum'. Find frequency of the letter 'h'
answer:
1


question:
Sentence: 'a picture of a machine built next to a street'. Find frequency of the letter 'x'
answer:
1


question:
Sentence: 'a pizza with thick crust sitting on top of a pan'. Find frequency of the letter 'u'
answer:

1