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

Sentence: 'a young girl is brushing her teeth in this dated photo'. Find frequency of the letter 't'
5

Sentence: 'a person riding a camel in front of a truck'. Find frequency of the letter 't'
2

Sentence: 'two giraffes are standing under a tree back to back'. Find frequency of the letter 's'

2