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

[Q]: Sentence: 'a family sitting at a table in a restaurant looking at their phones'. Find frequency of the letter 't'
[A]: 8


[Q]: Sentence: 'a piece of bread stuffed with meat and vegetables'. Find frequency of the letter 's'
[A]: 2


[Q]: Sentence: 'a boat is parked ashore without a passenger'. Find frequency of the letter 'b'
[A]:
1