Usage History of 'ras'

The following chart shows how frequently 'ras' appeared in printed materials over time. For example, the word 'ras' occurred 1 time in books in 1507 and 78,992 times in 2008. From 1507 to 2008, the word 'ras' was used a total of 2,068,274 times in books scanned by Google. See Reference: Google Ngram project.

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