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

Sentence: 'a sailboat is floating near the rocky shore of a beach'. Find frequency of the letter 'o'
5

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

Sentence: 'an intersection with a stop light and snow covered sidewalks'. Find frequency of the letter 't'

5