rate

https://doi.org/10.1351/goldbook.R05136
derived quantity in which time is a denominator quantity. Rate of x is dx/dt.
Source:
PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 988 (https://doi.org/10.1351/pac199668040957)