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

[EX Q]: Sentence: 'a yellow and green train on a train track in a wooded area'. Find frequency of the letter 'o'
[EX A]: 4

[EX Q]: Sentence: 'a social occasion of people are uncovered before the open day'. Find frequency of the letter 'c'
[EX A]: 4

[EX Q]: Sentence: 'flower in a vase full of water sitting on a stand '. Find frequency of the letter 'l'
[EX A]:
3