Usage History of 'billionaires'

The following chart shows how frequently 'billionaires' appeared in printed materials over time. For example, the word 'billionaires' occurred 6 times in books in 1855 and 8,587 times in 2008. From 1855 to 2008, the word 'billionaires' was used a total of 84,813 times in books scanned by Google. See Reference: Google Ngram project.

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