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

[Q]: Sentence: 'a lady is standing near a luggage stand at the air port'. Find frequency of the letter 'a'
[A]: 9


[Q]: Sentence: 'a person standing operating a cell phone in a room'. Find frequency of the letter 'n'
[A]: 6


[Q]: Sentence: 'a bridge is connected to a nearby building'. Find frequency of the letter 'd'
[A]:
3