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

[Q]: Sentence: 'city two way street with cars lined up on both sides'. Find frequency of the letter 'h'
[A]: 2


[Q]: Sentence: 'guy leans on truck's hood while taking pics next to parked motorcycles'. Find frequency of the letter 's'
[A]: 4


[Q]: Sentence: 'a multi-topping pizza with various glasses of alcohol on a table'. Find frequency of the letter 'o'
[A]:
6