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

[Q]: Sentence: 'a man hitting a tennis ball with a tennis racquet'. Find frequency of the letter 't'
[A]: 6


[Q]: Sentence: 'red chair next to side table with lamp in residential home'. Find frequency of the letter 'm'
[A]: 2


[Q]: Sentence: 'a cow eating or drinking from a trough next to a woman with a hose'. Find frequency of the letter 'g'
[A]:
3