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

[EX Q]: Sentence: 'a giraffe sticking it's tongue out near a window'. Find frequency of the letter 'a'
[EX A]: 4

[EX Q]: Sentence: 'a double parking meter is decorated with a picture of a girl with wings on her feet'. Find frequency of the letter 'r'
[EX A]: 6

[EX Q]: Sentence: 'a bedroom with a window, armoire, chair and table with plant'. Find frequency of the letter 'b'
[EX A]:
2