instruction:
In this task, you need to count the number of times the given letter appears in the given sentence.
question:
Sentence: 'a man working on a small laptop on a wooden table'. Find frequency of the letter 'l'
answer:
4


question:
Sentence: 'a white police vehicle parked on a paved street'. Find frequency of the letter 'a'
answer:
4


question:
Sentence: 'the view of a restroom with a toilet and washer and dryer combo'. Find frequency of the letter 'f'
answer:

1