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

Q: Sentence: 'a couple of men sitting next to each other under an umbrella'. Find frequency of the letter 'n'

A: 5
****
Q: Sentence: 'a group of workers washing and cleaning fruits and vegetables'. Find frequency of the letter 'i'

A: 3
****
Q: Sentence: 'a tall street light, camera, street sign combined into one'. Find frequency of the letter 's'

A:
3
****