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

[EX Q]: Sentence: 'two zebra stand near the wooden posts on a building'. Find frequency of the letter 't'
[EX A]: 4

[EX Q]: Sentence: 'young girl playing with refrigerator magnet while kneeling on floor'. Find frequency of the letter 'n'
[EX A]: 6

[EX Q]: Sentence: 'the man is getting ready to eat his meal'. Find frequency of the letter 'r'
[EX A]:
1