instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a group of people are playing soccer on a beach'. Find frequency of the letter 'l'
answer:
2


question:
Sentence: 'three woman are having a discussion in the kitchen'. Find frequency of the letter 'n'
answer:
5


question:
Sentence: 'a tour bus making a right turn as people wait'. Find frequency of the letter 'b'
answer:

1