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

Sentence: 'man is snow gear and skis skiing in the snow'. Find frequency of the letter 'i'
5

Sentence: 'a construction sign is displayed on a street'. Find frequency of the letter 'i'
4

Sentence: 'a woman standing next to a buffet table with food and bowls'. Find frequency of the letter 'g'

1