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

[Q]: Sentence: 'there is an old stove with old pots on the burners'. Find frequency of the letter 't'
[A]: 5


[Q]: Sentence: 'statues of 2 zebras and 1 giraffe in a doorway'. Find frequency of the letter 'a'
[A]: 6


[Q]: Sentence: '5 people standing in a room for a group photo'. Find frequency of the letter 'p'
[A]:
4