instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a snow filled mountain with a guy with ski's'. Find frequency of the letter 'f'
answer:
1


question:
Sentence: 'a woman in yellow dress standing next to a horse'. Find frequency of the letter 'l'
answer:
2


question:
Sentence: 'the zebra does not really look fully grown'. Find frequency of the letter 'z'
answer:

1