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

Q: Sentence: 'a train station with a train pulling into the platform'. Find frequency of the letter 'i'

A: 6
****
Q: Sentence: 'a jet flying through the clear blue sky'. Find frequency of the letter 'g'

A: 2
****
Q: Sentence: 'a man holding a plate filled with cucumber over a wooden table'. Find frequency of the letter 't'

A:
3
****