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

Sentence: 'a man standing in front of a statue near a metal pole'. Find frequency of the letter 'f'
2

Sentence: 'a train going over a bridge with some buildings in the background'. Find frequency of the letter 'd'
3

Sentence: 'a couple of young people standing in front of a tv'. Find frequency of the letter 'i'

2