Usage History of 'seismography'

The following chart shows how frequently 'seismography' appeared in printed materials over time. For example, the word 'seismography' occurred 8 times in books in 1866 and 104 times in 2008. From 1866 to 2008, the word 'seismography' was used a total of 3,171 times in books scanned by Google. See Reference: Google Ngram project.

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