instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a long row of tables displaying lots of fruit'. Find frequency of the letter 'o'
answer:
5


question:
Sentence: 'the wooden kitchen has a small child's plastic table in it'. Find frequency of the letter 'n'
answer:
3


question:
Sentence: 'a person is standing in front of a hotel holding an umbrella'. Find frequency of the letter 'r'
answer:

3