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

Q: Sentence: 'a man sitting inside a green military truck talking to someone'. Find frequency of the letter 'i'

A: 7
****
Q: Sentence: 'silhouette of person playing frisbee with moutain and sunset'. Find frequency of the letter 'i'

A: 5
****
Q: Sentence: 'the traffic light has turned yellow; proceed with caution'. Find frequency of the letter 'y'

A:
1
****