instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'tow birds flying by a long necked crane'. Find frequency of the letter 'f'
answer:
1


question:
Sentence: 'four men standing around two pizzas in a conference room'. Find frequency of the letter 't'
answer:
2


question:
Sentence: 'a street with a group of moped bikes parked in a row between other vehicles and people standing on the sidewalk next to them'. Find frequency of the letter 'n'
answer:

7