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

[EX Q]: Sentence: 'one woman is arranging the other woman's hair'. Find frequency of the letter 'o'
[EX A]: 4

[EX Q]: Sentence: 'a bird is standing on the ledge of the building'. Find frequency of the letter 't'
[EX A]: 3

[EX Q]: Sentence: 'a group of men standing next to parked motorcycles'. Find frequency of the letter 'e'
[EX A]:
4