Usage History of 'preamplifiers'

The following chart shows how frequently 'preamplifiers' appeared in printed materials over time. For example, the word 'preamplifiers' occurred 4 times in books in 1933 and 1,070 times in 2008. From 1933 to 2008, the word 'preamplifiers' was used a total of 48,612 times in books scanned by Google. See Reference: Google Ngram project.

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