Usage History of 'ionization'

The following chart shows how frequently 'ionization' appeared in printed materials over time. For example, the word 'ionization' occurred 2 times in books in 1792 and 84,561 times in 2008. From 1792 to 2008, the word 'ionization' was used a total of 3,986,215 times in books scanned by Google. See Reference: Google Ngram project.

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