Usage History of 'tracheophyte'

The following chart shows how frequently 'tracheophyte' appeared in printed materials over time. For example, the word 'tracheophyte' occurred 2 times in books in 1939 and 23 times in 2008. From 1939 to 2008, the word 'tracheophyte' was used a total of 2,322 times in books scanned by Google. See Reference: Google Ngram project.

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