instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'people waiting on a train platform in a wooded area'. Find frequency of the letter 'p'
answer:
3


question:
Sentence: 'a group of people are playing soccer on a beach'. Find frequency of the letter 'l'
answer:
2


question:
Sentence: 'a life size teddy bear sitting at a dining table'. Find frequency of the letter 'i'
answer:

6