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has been proliferating

  • present perfect progressive
    of proliferate (3rd person singular).
    proliferate
    verb (used with or without object)
    to grow or produce by multiplication of parts, as in budding or cell division, or by procreation.

Example Sentences

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For those who want to take matters into their own hands, encryption software has been proliferating across the Internet since the Snowden revelations broke.

From Seattle Times Dec. 3, 2013

“Snack” The “snack” has been proliferating at restaurants for several years now, with usage of the word tripling from 2007 to 2010 on fast food menus.

From Time Apr. 11, 2013

Insider trading has been proliferating at an alarming rate.

From Time Magazine Archive

Lately it has been proliferating with a vengeance.

From Time Magazine Archive