instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a child sitting a table with a pizza in front of him'. Find frequency of the letter 'h'
answer:
3


question:
Sentence: 'a group of workers washing and cleaning fruits and vegetables'. Find frequency of the letter 'i'
answer:
3


question:
Sentence: 'a small cake is covered in frosting on a plate'. Find frequency of the letter 'l'
answer:

3