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: 'an orange cat sitting on the ground next to a  purse'. Find frequency of the letter 's'
answer:
2


question:
Sentence: 'pizza with different vegetables sitting on top of a wooden slab'. Find frequency of the letter 'o'
answer:

5