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

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

[EX Q]: Sentence: 'the little girl is flying her kite in the field'. Find frequency of the letter 'i'
[EX A]: 7

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