Usage History of 'spirality'

The following chart shows how frequently 'spirality' appeared in printed materials over time. For example, the word 'spirality' occurred 2 times in books in 1747 and 75 times in 2008. From 1747 to 2008, the word 'spirality' was used a total of 7,098 times in books scanned by Google. See Reference: Google Ngram project.

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