instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a white paper plate with a slice of pizza on it'. Find frequency of the letter 'h'
answer:
2

question:
Sentence: 'tow birds flying by a long necked crane'. Find frequency of the letter 'f'
answer:
1

question:
Sentence: 'a woman wearing a pair of skis'. Find frequency of the letter 'n'
answer:
2