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

Q: Sentence: 'a baseball player dropping his bat and starting to run'. Find frequency of the letter 'o'

A: 2
****
Q: Sentence: 'a pizza is in a box on a table outside'. Find frequency of the letter 'u'

A: 1
****
Q: Sentence: 'a group of people next to a bus with skis and backpacks'. Find frequency of the letter 'n'

A:
2
****