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

[Q]: Sentence: 'a knife a cutting board some bananas and a toaster'. Find frequency of the letter 'i'
[A]: 2


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


[Q]: Sentence: 'two zebras in a dried grass area of a wooded area'. Find frequency of the letter 'n'
[A]:
1