Question: A popular tool for visualizing the themes in a speech is to draw a word cluster diagram, where the unique words from the speech are

A popular tool for visualizing the themes in a speech is to draw a word cluster diagram, where the unique words from the speech are drawn in a group, with each word’s size being in proportion to the number of times it is used in the speech. Given a speech containing n total words, describe an efficient method for counting the number of times each word is used in that speech. You may assume that you have a parser that returns the n words in a given speech as a sequence of character strings in O(n) time. What is the running time of your method?

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