Millirads per minute
Millirads per minute was a unit of radiation exposure, measured in rads per unit time.

Comparative units of dosage 
1 millirad per minute
 An adult spaceborne species, the "mother" of  sent energy rays at the  which emanated radiation at a level of 65 millirads per minute which later rose to 300 millirads. ()

 In 2367, while the crew of the Enterprise-D was trying to tow away a toxic waste barge threatening the population of Gamelan V, the computer warned the crew that radiation was approaching 70 millirads per minute and rising as the Enterprise came closer to the Gamelan sun, intending to lead to barge into the sun via a tractor beam. Later on, the radiation levels reached 300 millirads per minute, which would have caused lethal exposure to the crew. Fortunately, the Enterprise managed to tow the toxic barge into the sun, safely destroying it before any crewmembers died from the radiation. ()

1 rad per minute = 1,000 millirads per minute
 In 2368, Dr. Beverly Crusher told Geordi La Forge that the quaratum in one of the 's cargo bays had radiation levels of 83 rads, rising 4 rads a minute. La Forge commented that quaratum gets unstable at 350 rads. ()

1 rad per second = 60,000 millirads per minute
 In 2372, The Doctor attempted to slow down Tom Paris' cellular mutation with radiometric therapy at 45 rads per second. It had no effect, so The Doctor had Kes increase it to 85 rads per second. The Doctor had Kes increase the dosage to 98 rads per second when Paris' lymphatic system began to collapse. ()
Radiation
Measurements