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

[EX Q]: Sentence: 'a bowl of vegetables in a soup like substance next to a spoon'. Find frequency of the letter 'a'
[EX A]: 5

[EX Q]: Sentence: 'a person is riding in a cart pulled by a horse'. Find frequency of the letter 'a'
[EX A]: 4

[EX Q]: Sentence: 'a mother and daughter playing a  wii game'. Find frequency of the letter 'r'
[EX A]:
2