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

[Q]: Sentence: 'a man in a sweatshirt is taking his own picture'. Find frequency of the letter 'u'
[A]: 1


[Q]: Sentence: 'oranges are sitting in a bowl on a table'. Find frequency of the letter 'a'
[A]: 5


[Q]: Sentence: 'a river with a long dragon boat in it and rowers on the boat in sets of two, along with two other people'. Find frequency of the letter 'h'
[A]:
4