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 jet flying through the clear blue sky'. Find frequency of the letter 'g'

A: 2
****
Q: Sentence: 'a plastic container next to a toilet on a wooden box'. Find frequency of the letter 'i'

A:
3
****