Usage History of 'yawmeter'

The following chart shows how frequently 'yawmeter' appeared in printed materials over time. For example, the word 'yawmeter' occurred 22 times in books in 1920 and 5 times in 2007. From 1920 to 2007, the word 'yawmeter' was used a total of 963 times in books scanned by Google. See Reference: Google Ngram project.

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