instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a young man riding a skateboard near a forest'. Find frequency of the letter 'd'
answer:
2


question:
Sentence: 'a view from a bathroom shows an open door'. Find frequency of the letter 'o'
answer:
7


question:
Sentence: 'a glass front refrigerator stocked with several different bottles'. Find frequency of the letter 'o'
answer:

4