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: 'a man riding his skateboard down low as he turns'. Find frequency of the letter 'g'
[A]: 1


[Q]: Sentence: 'four photographs of a woman sitting in front of a television at night'. Find frequency of the letter 't'
[A]:
7