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

[Q]: Sentence: 'person wearing all white leaned up against a wall with a yellow sign'. Find frequency of the letter 'a'
[A]: 8

[Q]: Sentence: 'a metallic stove top oven inside of a wooden kitchen'. Find frequency of the letter 'v'
[A]: 2

[Q]: Sentence: 'there is a male surfer in the ocean riding a wave'. Find frequency of the letter 'r'
[A]:
4