Usage History of 'headroom'

The following chart shows how frequently 'headroom' appeared in printed materials over time. For example, the word 'headroom' occurred 2 times in books in 1641 and 5,043 times in 2008. From 1641 to 2008, the word 'headroom' was used a total of 149,641 times in books scanned by Google. See Reference: Google Ngram project.

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