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

Answer: 7


Question: Sentence: 'a dilapidated bench in a park under a tree'. Find frequency of the letter 'p'

Answer: 2


Question: Sentence: 'a laptop open with images on the screen'. Find frequency of the letter 'n'

Answer:
3