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

Q: Sentence: 'an commercial airline airplane flies above the clouds'. Find frequency of the letter 'n'

A: 3
****
Q: Sentence: 'a group of cars and house on truck passing in a street'. Find frequency of the letter 'i'

A: 2
****
Q: Sentence: 'people on a beach by the ocean flying kites'. Find frequency of the letter 'o'

A:
3
****
