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

[Q]: Sentence: 'one woman holding a video game controller and standing next to another woman'. Find frequency of the letter 't'
[A]: 5


[Q]: Sentence: 'man in red shirt with black suitcase standing outside of building'. Find frequency of the letter 'i'
[A]: 8


[Q]: Sentence: 'a living room with fireplace, sofa, chairs and coffee table'. Find frequency of the letter 's'
[A]:
2