In this task, you need to count the number of times the given letter appears in the given sentence.
--------
Question: Sentence: 'supplies and tools are arranged on the floor with a hard hat and bag'. Find frequency of the letter 'n'

Answer: 4

Question: Sentence: 'a crowd of fans watch soccer players from stadium seating'. Find frequency of the letter 'f'

Answer: 3

Question: Sentence: 'a t.v. that is sitting on a wooden t.v. stand'. Find frequency of the letter 's'

Answer:
3