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

Q: Sentence: 'small airplane in the process of taking off'. Find frequency of the letter 'e'

A: 3
****
Q: Sentence: 'two pepperoni pizzas and a cup on a counter'. Find frequency of the letter 'u'

A: 2
****
Q: Sentence: 'a truck with a bus in tow behind'. Find frequency of the letter 'h'

A:
2
****