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

[EX Q]: Sentence: 'a sailboat is floating near the rocky shore of a beach'. Find frequency of the letter 'o'
[EX A]: 5

[EX Q]: Sentence: 'a person holding onto a pink kite at the beach'. Find frequency of the letter 'n'
[EX A]: 4

[EX Q]: Sentence: 'a table and many different pots in a room'. Find frequency of the letter 't'
[EX A]:
3