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

Q: Sentence: 'tow birds flying by a long necked crane'. Find frequency of the letter 'f'

A: 1
****
Q: Sentence: 'people playing wii bowling in a modern library'. Find frequency of the letter 'o'

A: 3
****
Q: Sentence: 'the girl is smiling beside her tired horse'. Find frequency of the letter 'i'

A:
6
****