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

Sentence: 'one woman holding a video game controller and standing next to another woman'. Find frequency of the letter 't'
5

Sentence: 'man sitting on the side of a van playing the guitar'. Find frequency of the letter 'm'
1

Sentence: 'a cargo plane being loaded by a scissor jack truck'. Find frequency of the letter 'b'

2