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

[Q]: Sentence: 'a long row of tables displaying lots of fruit'. Find frequency of the letter 'o'
[A]: 5


[Q]: Sentence: 'a large motorcycle that has a man dressed in old clothing next to it'. Find frequency of the letter 'a'
[A]: 6


[Q]: Sentence: 'group of cars on the road with the sun setting behind it'. Find frequency of the letter 'd'
[A]:
2