instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a dog is shown sitting on rocks by the beach'. Find frequency of the letter 'a'
answer:
2


question:
Sentence: 'a truck is parked in front of a store'. Find frequency of the letter 't'
answer:
3


question:
Sentence: 'vintage photo of three baseballers standing with bats smiling'. Find frequency of the letter 'e'
answer:

5