Usage History of 'flashcards'

The following chart shows how frequently 'flashcards' appeared in printed materials over time. For example, the word 'flashcards' occurred 6 times in books in 1917 and 7,108 times in 2008. From 1917 to 2008, the word 'flashcards' was used a total of 76,506 times in books scanned by Google. See Reference: Google Ngram project.

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