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

[Q]: Sentence: 'a guy riding a bike close to a car in the street'. Find frequency of the letter 'i'
[A]: 4


[Q]: Sentence: 'a dog laying on the back of a boat in the water'. Find frequency of the letter 't'
[A]: 4


[Q]: Sentence: 'a plate of food and a bowl of snacks are ready to be eaten'. Find frequency of the letter 'a'
[A]:
8