instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'cars parked outside if a retail store'. Find frequency of the letter 'd'
answer:
2


question:
Sentence: 'a wedding cake with pink roses on a silver plate'. Find frequency of the letter 'a'
answer:
4


question:
Sentence: 'a crowd of people standing in front of a green train'. Find frequency of the letter 'g'
answer:

2