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

Sentence: 'the little girl is flying her kite in the field'. Find frequency of the letter 'i'
7

Sentence: 'the counter of a doctor's office, including a laptop, cotton swabs, and tongue depressors'. Find frequency of the letter 'g'
2

Sentence: 'a laptop computer sitting on top of a desk next to a monitor and keyboard'. Find frequency of the letter 'f'

1