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

Q: Sentence: 'a traffic signal by a wire filled with some birds'. Find frequency of the letter 'e'

A: 3
****
Q: Sentence: 'three elephants walk up a dirt trail from the water'. Find frequency of the letter 'l'

A: 3
****
Q: Sentence: 'three giraffes are shown in a zoo confinement'. Find frequency of the letter 'n'

A:
5
****