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

[EX Q]: Sentence: 'a man walking a large elephant down a dirt road'. Find frequency of the letter 'g'
[EX A]: 2

[EX Q]: Sentence: 'a person on a surfboard in the surf of a wave'. Find frequency of the letter 's'
[EX A]: 3

[EX Q]: Sentence: 'the lady is enjoying her time arranging the flowers'. Find frequency of the letter 'e'
[EX A]:
6