Time-apportion
From ACT Wiki
To allocate a money amount on a time basis.
For example total profits of EUR 100,000 for a period of one year (365 days) consisting of a one month (30 days) period and an 11 months (335 days) period would be time-apportioned as follows:
One month period:
EUR 100,000 x 30/365
= EUR 8,219
11 months period:
EUR 100,000 x 335/365
= EUR 91,781