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: 'small black bird with red on its head standing on a tree branch'. Find frequency of the letter 'b'
[EX A]: 3

[EX Q]: Sentence: 'a hot dog in a bun with condiments'. Find frequency of the letter 'e'
[EX A]:
1