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

Q: Sentence: 'a man and a woman are walking down the street with an umbrella over their heads'. Find frequency of the letter 'w'

A: 4
****
Q: Sentence: 'man in a sleeping bag on the floor using a laptop computer'. Find frequency of the letter 'i'

A: 3
****
Q: Sentence: 'an off the kitchen bathroom provides convenience for any chef'. Find frequency of the letter 'e'

A:
7
****