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

Q: Sentence: 'an image of a cautionary construction sign'. Find frequency of the letter 'a'

A: 5
****
Q: Sentence: 'a desk covered in notepads, a laptop and other devices'. Find frequency of the letter 'c'

A: 2
****
Q: Sentence: 'a vase with flowers, a clock and paintings inside of a building'. Find frequency of the letter 'd'

A:
3
****