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

[EX Q]: Sentence: 'supplies and tools are arranged on the floor with a hard hat and bag'. Find frequency of the letter 'n'
[EX A]: 4

[EX Q]: Sentence: 'a man that is on his cell phone'. Find frequency of the letter 's'
[EX A]: 2

[EX Q]: Sentence: 'a small kitchen with dark wood cabinets and white appliances'. Find frequency of the letter 'd'
[EX A]:
3