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

[Q]: Sentence: 'a wedding cake with pink roses on a silver plate'. Find frequency of the letter 'a'
[A]: 4


[Q]: Sentence: 'a kitchen with hanging lights, an island with sink and bar stools, a refrigerator, small pantry door, wooden cabinets and shiny wood floor'. Find frequency of the letter 'n'
[A]: 12


[Q]: Sentence: 'a young man kneeling down to a little boy as they both hold game controllers'. Find frequency of the letter 'l'
[A]:
6