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

Sentence: 'a baseball themed birthday cake is on a serving tray'. Find frequency of the letter 'g'
1

Sentence: 'a boy swinging a bat while playing baseball'. Find frequency of the letter 'h'
1

Sentence: 'pizza on a wooden table being cut into slices'. Find frequency of the letter 'z'

2