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

[EX Q]: Sentence: 'a baby calf has a tag on its right ear'. Find frequency of the letter 'n'
[EX A]: 1

[EX Q]: Sentence: 'a very big nice looking living room with nice furnishings'. Find frequency of the letter 'e'
[EX A]: 3

[EX Q]: Sentence: 'a chair with the arms and legs of s stuffed animal in a child's room'. Find frequency of the letter 'n'
[EX A]:
3