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

Sentence: 'this is an image of a woman playing tennis'. Find frequency of the letter 'f'
1

Sentence: 'a knife a cutting board some bananas and a toaster'. Find frequency of the letter 'i'
2

Sentence: 'open laptop computer beside of cat and bookcase'. Find frequency of the letter 'l'

1