instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a train is sitting at a train station'. Find frequency of the letter 'r'
answer:
2

question:
Sentence: 'a gourmet looking hamburger with fries on a dining table with some wine'. Find frequency of the letter 't'
answer:
4

question:
Sentence: 'a group of birds in the sand by the water'. Find frequency of the letter 't'
answer:
3