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

Q: Sentence: 'a man working on a small laptop on a wooden table'. Find frequency of the letter 'l'

A: 4
****
Q: Sentence: 'the wooden kitchen has a small child's plastic table in it'. Find frequency of the letter 'n'

A: 3
****
Q: Sentence: 'a close up of a train on a track in the dark'. Find frequency of the letter 'a'

A:
6
****