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

Sentence: 'guy leans on truck's hood while taking pics next to parked motorcycles'. Find frequency of the letter 's'
4

Sentence: 'two women standing next to each other holding tennis rackets'. Find frequency of the letter 't'
7

Sentence: 'a blender that has had some liquid come out on the counter'. Find frequency of the letter 'b'

1