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

Q: Sentence: 'a woman sitting in front of a giant slice of cheese pizza'. Find frequency of the letter 'e'

A: 4
****
Q: Sentence: 'an empty clean kitchen with island, marble countertops , stove and cabinetry'. Find frequency of the letter 'l'

A: 3
****
Q: Sentence: 'a passenger train that is traveling down the tracks'. Find frequency of the letter 'n'

A:
4
****