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

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

A: 5
****
Q: Sentence: 'a group of people are playing soccer on a beach'. Find frequency of the letter 'l'

A: 2
****
Q: Sentence: 'a stop sign in font of a plant with red flowers'. Find frequency of the letter 'o'

A:
4
****