instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a woman cross country skiing in a competition'. Find frequency of the letter 's'
answer:
3

question:
Sentence: 'two giraffes standing next to some trees'. Find frequency of the letter 'f'
answer:
2

question:
Sentence: 'a black and white picture of two men playing a tennis match with the umpire and spectators look on'. Find frequency of the letter 'e'
answer:
7