instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'two elephants walking on cement next to wall'. Find frequency of the letter 'n'
answer:
5


question:
Sentence: 'a girl laying on a bed posing for a picture'. Find frequency of the letter 'i'
answer:
4


question:
Sentence: 'a man jumping in the air on a skateboard'. Find frequency of the letter 'i'
answer:

3