zēng​jiǎn

add or subtract

增减 (增減) zēng​jiǎn
add or subtract verb
to add or subtract; to adjust by adding or taking away

The temperature is unpredictable, so be mindful of adding or removing clothing as needed when going out.

fluctuate verb
to increase or decrease; to go up or go down

Monthly production will fluctuate with changes in market demand.

Frequency

Movie subtitles
0.030 per million appears in 0% of films
Written text
3.38 per million

Sources

Definitions
CC-CEDICT