instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'the sun goes down over a bike tied to a bench at the beach'. Find frequency of the letter 't'
answer:
5


question:
Sentence: 'a woman fully dressed as a geisha'. Find frequency of the letter 'm'
answer:
1


question:
Sentence: 'two identical trains are parked at a loading station'. Find frequency of the letter 'a'
answer:

8