instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a jet that is flying in the sky with a banner behind it'. Find frequency of the letter 'r'
answer:
1

question:
Sentence: 'a young man with glasses on is taking a big bite'. Find frequency of the letter 's'
answer:
4

question:
Sentence: 'a couple of beautiful women walking down street holding umbrellas'. Find frequency of the letter 'l'
answer:
6