Fig 4. The “women and gender” topic broadened significantly after 1990.

This figure shows the stacked term frequencies of the 10 terms most overrepresented in the “women and gender” topic from 1990 to 2009 compared to 1970 to 1989. A stacked display means that the frequencies are displayed one on top of the other. The term frequency of “African,” for example, does not start at the zero line but rather on top of the “race/racial” line.