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

Q: Sentence: 'a sheep in a field in front of other sheep'. Find frequency of the letter 'f'

A: 3
****
Q: Sentence: 'two bears swim in a blue pool of water'. Find frequency of the letter 'o'

A: 4
****
Q: Sentence: 'a small herd of elephants with large white tusk'. Find frequency of the letter 'd'

A:
1
****