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

Q: Sentence: 'girls posing of a picture one holding a tennis racket the other wearing a crown'. Find frequency of the letter 'g'

A: 4
****
Q: Sentence: 'a herd of horses standing next to each other on a field'. Find frequency of the letter 'r'

A: 3
****
Q: Sentence: 'a woman in a brown coat this is holding a phone'. Find frequency of the letter 'w'

A:
2
****