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

[Q]: Sentence: 'a boy that is sitting at a table with pizza'. Find frequency of the letter 's'
[A]: 2


[Q]: Sentence: 'a young elephant is touching a bigger elephant with its trunk'. Find frequency of the letter 'i'
[A]: 5


[Q]: Sentence: 'streaming kites flying above a building and a body of water'. Find frequency of the letter 'u'
[A]:
1