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

Sentence: 'a teddy bear is sitting on a heart shaped patio chair outside'. Find frequency of the letter 'i'
6

Sentence: 'a dog on a couch near many pillows'. Find frequency of the letter 'p'
1

Sentence: 'three giraffes standing together near the gate of their enclosure'. Find frequency of the letter 't'

7