That repeats over a relatively short period(adjective)
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Use "subchronic" in a sentence
"Such depressions cause subchronic or chronic stress which then affects the limbic-hypothalamic-pituitary-adrenal/thyroid/gonads axes."
"Dietary sources of vitamin D are often inadequate to meet our minimum needs, and this is now resulting in an epidemic of subchronic vitamin D deficiency diseases."
"Endpoints investigated have included subchronic and chronic changes in metabolism, histopathology, and function of most systems; reproductive effects; growth; teratogenicity; and mutagenicity."