Single word request: a non-changing temporal trend [closed]
Is there a word for describing a non-changing temporal trend? Stasis?
E.g. expenditure on health care did not change between 2000-2020.
So far as I can make any sense out of the given information, the word you seem to be looking for is constant.
INVARIABLE, UNIFORM
[Merriam-Webster]
So you could say Expenditure on healthcare remained constant during 2000-2020.