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

[EX Q]: Sentence: 'a bedroom with a neatly made bed and a laptop'. Find frequency of the letter 'l'
[EX A]: 2

[EX Q]: Sentence: 'a line of people on motorcycles on the road'. Find frequency of the letter 'e'
[EX A]: 5

[EX Q]: Sentence: 'a black-and-white photo of a young man brushing his teeth'. Find frequency of the letter 'h'
[EX A]:
5