instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a train sits on a railroad track as a metal awning covers it'. Find frequency of the letter 'l'
answer:
2


question:
Sentence: 'a player swings his bat at a baseball game'. Find frequency of the letter 'p'
answer:
1


question:
Sentence: 'a baseball player gets ready to hit the ball'. Find frequency of the letter 'l'
answer:

5