instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a red fire hydrant opened and spilling water'. Find frequency of the letter 'd'
answer:
4


question:
Sentence: 'a person holding a wine glass in one hand and bread sticks in the other'. Find frequency of the letter 'd'
answer:
4


question:
Sentence: 'male posing with surfboard at the corner of a lawn next to a street'. Find frequency of the letter 's'
answer:

3