instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a bowl of granola, dried fruit, and bananas'. Find frequency of the letter 'u'
answer:
1


question:
Sentence: 'there is a zebra that is walking enar a car'. Find frequency of the letter 'r'
answer:
4


question:
Sentence: 'city bus is picking people up at one of it stop'. Find frequency of the letter 'l'
answer:

1