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

Q: Sentence: 'three young children playing with a ball in front of a huge bridge'. Find frequency of the letter 'e'

A: 5
****
Q: Sentence: 'a bird is perched on a container in a person's hand'. Find frequency of the letter 'c'

A: 2
****
Q: Sentence: 'train moving along track on raised bridge over river'. Find frequency of the letter 'k'

A:
1
****