duō​biàn

changeable

多变 (多變) duō​biàn
changeable descriptive
frequently changing or unpredictable; fickle

Spring weather is always so changeable.

multivariate adjective
involving or containing several variables in a mathematical context

He is studying a complex multivariable function.

Frequency

Movie subtitles
1.31 per million appears in 1% of films
Written text
6.38 per million

Sources

Definitions
CC-CEDICT