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

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

[EX Q]: Sentence: 'a close up of a plate with a whole carrot'. Find frequency of the letter 'w'
[EX A]: 2

[EX Q]: Sentence: 'a woman is walking and talking on her phone'. Find frequency of the letter 'd'
[EX A]:
1