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

[Q]: Sentence: 'two giraffes standing next to some trees'. Find frequency of the letter 'f'
[A]: 2


[Q]: Sentence: 'a tower with some bright lights and clocks on it'. Find frequency of the letter 'h'
[A]: 3


[Q]: Sentence: 'a couple of kids standing next to a truck'. Find frequency of the letter 'l'
[A]:
1