Usage History of 'intrathecal'

The following chart shows how frequently 'intrathecal' appeared in printed materials over time. For example, the word 'intrathecal' occurred 30 times in books in 1877 and 10,736 times in 2008. From 1877 to 2008, the word 'intrathecal' was used a total of 314,358 times in books scanned by Google. See Reference: Google Ngram project.

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