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

Q: Sentence: 'baseball player reaching back as he's about to throw the ball'. Find frequency of the letter 'e'

A: 5
****
Q: Sentence: 'two zebras standing around while a third zebra drinks from a pond'. Find frequency of the letter 's'

A: 3
****
Q: Sentence: 'a white hotel bathroom with a shower and bath'. Find frequency of the letter 'o'

A:
4
****