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

Q: Sentence: 'a silver train crossing the road on tracks'. Find frequency of the letter 'r'

A: 5
****
Q: Sentence: 'a woman holds a wine glass upside down while wearing rabbit ears and staring at a bottle of wine'. Find frequency of the letter 'a'

A: 11
****
Q: Sentence: 'living room with white walls and a wooden floor'. Find frequency of the letter 'l'

A:
4
****