instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'children with scissors and construction paper in a school classroom'. Find frequency of the letter 'c'
answer:
6


question:
Sentence: 'there is a woman pointing at something with her dog'. Find frequency of the letter 'i'
answer:
5


question:
Sentence: 'the train has just passed the crosswalk, and gates are closed to prevent pedestrian and vehicular traffic on the tracks at this time'. Find frequency of the letter 'n'
answer:

6