instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a boy swinging a bat while playing baseball'. Find frequency of the letter 'h'
answer:
1


question:
Sentence: 'a woman in a tank top reaches out for a frisbee'. Find frequency of the letter 'a'
answer:
6


question:
Sentence: 'police escorting large groups of people down an urban street'. Find frequency of the letter 'l'
answer:

3