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

Sentence: 'tow birds flying by a long necked crane'. Find frequency of the letter 'f'
1

Sentence: 'a woman is taking a sip of a drink from a glass'. Find frequency of the letter 'i'
4

Sentence: 'a little boy standing in a living room holding a remote'. Find frequency of the letter 'm'

2