instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a little child looking up to a camera holding a cell phone'. Find frequency of the letter 'g'
answer:
2


question:
Sentence: 'large grassy pasture filled with trees and a single horse'. Find frequency of the letter 'l'
answer:
4


question:
Sentence: 'a man plays baseball with a young person'. Find frequency of the letter 'r'
answer:

1