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

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

[EX Q]: Sentence: 'a snowboarder making a jump of a snowy ledge'. Find frequency of the letter 'o'
[EX A]: 4

[EX Q]: Sentence: 'young adults serving food samples for a cause'. Find frequency of the letter 'c'
[EX A]:
1