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

[Q]: Sentence: 'a bathroom with a sink, counter top, and mirror is shown'. Find frequency of the letter 'i'
[A]: 4


[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: 'the words, "spoil yourself" are visible on the display screen embedded in an airplane seatback'. Find frequency of the letter 't'
[A]:
3