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

[EX Q]: Sentence: 'a commuter bus in england by a clock tower building'. Find frequency of the letter 'w'
[EX A]: 1

[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: 'an old picture of men in bathing suits and uniforms around a plane'. Find frequency of the letter 't'
[EX A]:
3