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

[Q]: Sentence: 'a young boy standing in front of a counter with dougnuts'. Find frequency of the letter 'o'
[A]: 6


[Q]: Sentence: 'a red stop sign with street signs above it'. Find frequency of the letter 't'
[A]: 5


[Q]: Sentence: 'a woman and a girl sitting at a dinner table talking'. Find frequency of the letter 'n'
[A]:
6