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 row of vintage cars in a grassy field'. Find frequency of the letter 'v'
answer:
1

question:
Sentence: 'soft toy teddy bears and other toys in a trolley'. Find frequency of the letter 'e'
answer:
4