Usage History of 'speakerphone'

The following chart shows how frequently 'speakerphone' appeared in printed materials over time. For example, the word 'speakerphone' occurred 4 times in books in 1955 and 4,360 times in 2008. From 1955 to 2008, the word 'speakerphone' was used a total of 53,480 times in books scanned by Google. See Reference: Google Ngram project.

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