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

[EX Q]: Sentence: 'a person trying to flip a skateboard in a garage'. Find frequency of the letter 'a'
[EX A]: 7

[EX 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'
[EX A]: 11

[EX Q]: Sentence: 'a girl flies a kite in the air outside'. Find frequency of the letter 'i'
[EX A]:
6