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

Sentence: 'man sitting on the side of a van playing the guitar'. Find frequency of the letter 'm'
1

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

Sentence: 'supplies and tools are arranged on the floor with a hard hat and bag'. Find frequency of the letter 'n'

4