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

[EX Q]: Sentence: 'large grassy pasture filled with trees and a single horse'. Find frequency of the letter 'l'
[EX A]: 4

[EX Q]: Sentence: 'red chair next to side table with lamp in residential home'. Find frequency of the letter 'm'
[EX A]: 2

[EX Q]: Sentence: 'a train traveling through a town next to a blue and white building'. Find frequency of the letter 'n'
[EX A]:
6