instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a group of people walking down a rain soaked street with umbrellas'. Find frequency of the letter 'w'
answer:
3


question:
Sentence: 'some food on plates next to each other on a table'. Find frequency of the letter 'e'
answer:
6


question:
Sentence: 'the game is being played on a baseball field located in a residential area'. Find frequency of the letter 'b'
answer:

3