Usage History of 'impedance'

The following chart shows how frequently 'impedance' appeared in printed materials over time. For example, the word 'impedance' occurred 4 times in books in 1811 and 151,915 times in 2008. From 1811 to 2008, the word 'impedance' was used a total of 5,091,350 times in books scanned by Google. See Reference: Google Ngram project.

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