variability
n. uncountablen. the quality of changing often or being different in different situations. You use this to describe how much something varies instead of staying the same.
n. the quality or state of being subject to change or variation. Refers to the extent to which data points or conditions differ from one another or from an average.
The weather here shows great variability during the spring.
Scientists are studying the genetic variability of the virus to understand how it might mutate in the future.
High levels of heart rate variability are generally associated with better cardiovascular fitness and a more resilient autonomic nervous system.
Derived form of variable, from Old French variable; see variable + -ity.
Often paired with 'in' to specify the area of change ('variability in temperature') or 'of' to specify the subject ('variability of results').