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

[EX Q]: Sentence: 'a dog is shown sitting on rocks by the beach'. Find frequency of the letter 'a'
[EX A]: 2

[EX Q]: Sentence: 'a little boy standing near a couch and a table'. Find frequency of the letter 'i'
[EX A]: 2

[EX Q]: Sentence: 'an older lady seems to be feeding the pigeons'. Find frequency of the letter 'g'
[EX A]:
2