In this task, you need to count the number of times the given letter appears in the given sentence.
One example: Sentence: 'a large group of bananas proped up on several bicycles'. Find frequency of the letter 'e'
Solution is here: 5
Explanation: The letter 'e' appears 5 times in the sentence.

Now, solve this: Sentence: 'side view of two standing elephants with a man on neck of one, both elephants with trunks to ground, in front of two long logs outside with hut and trees behind'. Find frequency of the letter 'i'
Solution:
9