instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a woman with short, brown hair is looking into a circular mirror and holding a camera up to her cheek'. Find frequency of the letter 'e'
answer:
4


question:
Sentence: 'an area that has surrounded by a metal fence'. Find frequency of the letter 'o'
answer:
1


question:
Sentence: 'a clean kitchen with stainless steel cabinets and a stove filled with pans'. Find frequency of the letter 'v'
answer:

1