instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'some sheep are standing in a grassy field'. Find frequency of the letter 'n'
answer:
3

question:
Sentence: 'a downhill skier with snow plumes behind them'. Find frequency of the letter 'i'
answer:
4

question:
Sentence: 'a man holding a toilet seat on a square toilet in a bathroom'. Find frequency of the letter 's'
answer:
2