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

Q: Sentence: 'a cat that is standing next to an open suitcase'. Find frequency of the letter 'e'

A: 3
****
Q: Sentence: 'the skateboarder is jumping over a huge statue of a shoe'. Find frequency of the letter 'i'

A: 2
****
Q: Sentence: 'a number of cows in a meadow surrounded by a barbed wire fence'. Find frequency of the letter 'u'

A:
3
****