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

[Q]: Sentence: 'hotel towels with sunglasses perched and hotel business cards and catalog'. Find frequency of the letter 'o'
[A]: 4

[Q]: Sentence: 'a baseball themed birthday cake is on a serving tray'. Find frequency of the letter 'g'
[A]: 1

[Q]: Sentence: 'male baseball player dressed in red stands on the infield'. Find frequency of the letter 'e'
[A]:
8