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

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


[Q]: Sentence: 'a woman throwing a frisbee on a field'. Find frequency of the letter 's'
[A]: 1


[Q]: Sentence: 'a birthday cake with a number one and three candle'. Find frequency of the letter 'w'
[A]:
1