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

[Q]: Sentence: 'a parking meter painted green with a sign that describes it as not a parking meter'. Find frequency of the letter 's'
[A]: 4


[Q]: Sentence: 'an empty clean kitchen with island, marble countertops , stove and cabinetry'. Find frequency of the letter 'l'
[A]: 3


[Q]: Sentence: 'a row of remotes that have been lined up'. Find frequency of the letter 'e'
[A]:
6