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

[Q]: Sentence: 'a woman standing next to a man on a motorcycle in front of a market'. Find frequency of the letter 'l'
[A]: 1

[Q]: Sentence: 'two bigger elephants standing with a small elephant'. Find frequency of the letter 't'
[A]: 5

[Q]: Sentence: 'a couple of bikes are parked outside together'. Find frequency of the letter 'd'
[A]:
2