instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'baseball player reaching back as he's about to throw the ball'. Find frequency of the letter 'e'
answer:
5


question:
Sentence: 'a small doughnut held in a persons hand'. Find frequency of the letter 'n'
answer:
4


question:
Sentence: 'a woman with an umbrella waits at in intersection'. Find frequency of the letter 'n'
answer:

5