instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a family sitting at a table in a restaurant looking at their phones'. Find frequency of the letter 't'
answer:
8


question:
Sentence: 'a young girl skiing down a snowy mountain'. Find frequency of the letter 'l'
answer:
1


question:
Sentence: 'storm clouds are over two vehicles traveling'. Find frequency of the letter 's'
answer:

3