In this task, you need to count the number of times the given letter appears in the given sentence.
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Question: Sentence: 'the two dogs are playing in the pen together'. Find frequency of the letter 'o'

Answer: 3


Question: Sentence: 'two elephants facing each other touching trunks in an enclosure'. Find frequency of the letter 'f'

Answer: 1


Question: Sentence: 'dinner table with three pizzas with various toppings, a salad and drinks'. Find frequency of the letter 'a'

Answer:
7