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

[EX Q]: Sentence: 'a pizza pie sitting on a wooden table with tongs'. Find frequency of the letter 't'
[EX A]: 5

[EX Q]: Sentence: 'a wedding cake with pink roses on a silver plate'. Find frequency of the letter 'a'
[EX A]: 4

[EX Q]: Sentence: 'a sandwich served on a plate with salad'. Find frequency of the letter 'n'
[EX A]:
2