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

Sentence: 'a group of men standing around a table cutting a cake'. Find frequency of the letter 'g'
3

Sentence: 'two men in black wet suits beside a white surfboard'. Find frequency of the letter 'e'
5

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

2