TASK DEFINITION: In this task, you need to count the number of times the given letter appears in the given sentence.
PROBLEM: Sentence: 'red chair next to side table with lamp in residential home'. Find frequency of the letter 'm'

SOLUTION: 2

PROBLEM: Sentence: 'a bus with two floors belonging to london country'. Find frequency of the letter 't'

SOLUTION: 4

PROBLEM: Sentence: 'a girl sits on a surfboard and smiles'. Find frequency of the letter 'i'

SOLUTION:
3