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

Q: Sentence: 'a group of people are playing soccer on a beach'. Find frequency of the letter 'l'

A: 2
****
Q: Sentence: 'a gray colored pigeon that is perched on a railing outside of a building, with other buildings in the background'. Find frequency of the letter 'e'

A: 7
****
Q: Sentence: 'some bikers are sitting on their motorcycles outside'. Find frequency of the letter 's'

A:
5
****