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

[Q]: Sentence: 'a gray elephant is in a grassy field'. Find frequency of the letter 'e'
[A]: 3


[Q]: Sentence: 'a tower with some bright lights and clocks on it'. Find frequency of the letter 'h'
[A]: 3


[Q]: Sentence: 'a table topped with lots of white plates filled with food'. Find frequency of the letter 'h'
[A]:
3