In this task, you need to count the number of times the given letter appears in the given sentence.
--------
Question: Sentence: 'a woman is playing an interactive video game'. Find frequency of the letter 't'

Answer: 2


Question: Sentence: 'a cooked pizza on a silver platter with another in the background'. Find frequency of the letter 'e'

Answer: 5


Question: Sentence: 'a white kitchen with a long marble counter'. Find frequency of the letter 'n'

Answer:
3