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

Q: Sentence: 'a small boy in a high chair eating a cupcake'. Find frequency of the letter 'i'

A: 4
****
Q: Sentence: 'two pepperoni pizzas and a cup on a counter'. Find frequency of the letter 'u'

A: 2
****
Q: Sentence: 'a woman at a desk with a computer monitor and cd case'. Find frequency of the letter 'e'

A:
3
****