In this task, you need to count the number of times the given letter appears in the given sentence.

[EX Q]: Sentence: 'town clocks affixed to a tall, brick building'. Find frequency of the letter 'r'
[EX A]: 1

[EX Q]: Sentence: 'people playing wii bowling in a modern library'. Find frequency of the letter 'o'
[EX A]: 3

[EX Q]: Sentence: 'a street sign for 3rd street that is almost completely fallen over'. Find frequency of the letter 'p'
[EX A]:
1