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

[EX Q]: Sentence: 'a small boy in a high chair eating a cupcake'. Find frequency of the letter 'i'
[EX A]: 4

[EX Q]: Sentence: 'a man with headphones on is hunched over a sink while being recorded'. Find frequency of the letter 'd'
[EX A]: 4

[EX Q]: Sentence: 'a couple looking at the camer with their dinner pizza dishes'. Find frequency of the letter 'i'
[EX A]:
6