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

Q: Sentence: 'a toilet of some sort near a sink of some sort'. Find frequency of the letter 'o'

A: 7
****
Q: Sentence: 'a man in a sweatshirt is taking his own picture'. Find frequency of the letter 'u'

A: 1
****
Q: Sentence: 'a small girl sitting in front of a birthday cake'. Find frequency of the letter 'k'

A:
1
****