In this task, you need to count the number of times the given letter appears in the given sentence.

Q: Sentence: 'a white and blue plate topped with meat and a salad'. Find frequency of the letter 'u'

A: 1
****
Q: Sentence: 'a guy riding a bike close to a car in the street'. Find frequency of the letter 'i'

A: 4
****
Q: Sentence: 'the person is sitting in the snow with their surf board'. Find frequency of the letter 'd'

A:
1
****