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

[EX Q]: Sentence: 'a long row of tables displaying lots of fruit'. Find frequency of the letter 'o'
[EX A]: 5

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

[EX Q]: Sentence: 'clock and sign on a train station platform'. Find frequency of the letter 'g'
[EX A]:
1