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

Sentence: 'a man riding a skateboard up the side of a ramp'. Find frequency of the letter 'u'
1

Sentence: 'the interior of a living and dining room'. Find frequency of the letter 'i'
6

Sentence: 'some women at a round wooden table are making food'. Find frequency of the letter 'g'

1