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

[Q]: Sentence: 'a man sitting in front of a laptop computer next to a child'. Find frequency of the letter 'e'
[A]: 2


[Q]: Sentence: 'a woman holds a wine glass upside down while wearing rabbit ears and staring at a bottle of wine'. Find frequency of the letter 'a'
[A]: 11


[Q]: Sentence: 'a large group of motorcycles parked along a street'. Find frequency of the letter 'a'
[A]:
5