instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'four women around a man sitting in front of a cake'. Find frequency of the letter 'o'
answer:
5


question:
Sentence: 'one woman holding a video game controller and standing next to another woman'. Find frequency of the letter 't'
answer:
5


question:
Sentence: 'two street signs on a red and white pole next to street'. Find frequency of the letter 'r'
answer:

3