instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'three people are gathered around sitting on a park bench'. Find frequency of the letter 'g'
answer:
2


question:
Sentence: 'a  woman standing next to a man on a motorcycle in front of a market'. Find frequency of the letter 'l'
answer:
1


question:
Sentence: 'a new york yankees player stands on the ball field'. Find frequency of the letter 's'
answer:

3