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

Q: Sentence: 'a blue train on a track next to another track'. Find frequency of the letter 'c'

A: 2
****
Q: Sentence: 'a person standing operating a cell phone in a room'. Find frequency of the letter 'n'

A: 6
****
Q: Sentence: 'two little girls playing with a bat and a tennis ball'. Find frequency of the letter 'w'

A:
2
****