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

Sentence: 'a man with a large grey and black beard and glasses and a tie'. Find frequency of the letter 'e'
5

Sentence: 'a bowl of granola, dried fruit, and bananas'. Find frequency of the letter 'u'
1

Sentence: 'a room with chairs and a clock on the wall'. Find frequency of the letter 'm'

1