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

[Q]: Sentence: 'a notebook and pen are left on a park bench'. Find frequency of the letter 'e'
[A]: 5


[Q]: Sentence: 'there is a woman pointing at something with her dog'. Find frequency of the letter 'i'
[A]: 5


[Q]: Sentence: 'street signs are displayed on poles beside the sidewalk'. Find frequency of the letter 'i'
[A]:
4