Usage History of 'challengingly'

The following chart shows how frequently 'challengingly' appeared in printed materials over time. For example, the word 'challengingly' occurred 2 times in books in 1828 and 2,319 times in 2008. From 1828 to 2008, the word 'challengingly' was used a total of 55,752 times in books scanned by Google. See Reference: Google Ngram project.

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