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 construction sign is displayed on a street'. Find frequency of the letter 'i'
[EX A]: 4

[EX Q]: Sentence: 'a group of three white wall mounted urinals'. Find frequency of the letter 'e'
[EX A]:
4