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

Sentence: 'a woman is playing an interactive video game'. Find frequency of the letter 't'
2

Sentence: 'supplies and tools are arranged on the floor with a hard hat and bag'. Find frequency of the letter 'n'
4

Sentence: 'the red pick up truck is in a parking space'. Find frequency of the letter 's'

2