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

Q: Sentence: 'an area that has surrounded by a metal fence'. Find frequency of the letter 'o'

A: 1
****
Q: Sentence: 'there is a baseball game on and a few people are watching'. Find frequency of the letter 'i'

A: 2
****
Q: Sentence: 'the delivery trucks are invading a small area of the street'. Find frequency of the letter 'l'

A:
3
****