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 number of small boats on a beach near an umbrella'. Find frequency of the letter 's'
answer:
2


question:
Sentence: 'a person holding a pastry with chocolate'. Find frequency of the letter 'l'
answer:

2