Arthashastra
निर्दिष्ट कालायां तद् एव संख्याय बन्धं च दद्यात् ॥
If the period (for which such things are to be given to her) is limited, then a certain amount of money fixed in proportion to the income of the maintainer shall be given to her.
english translation
nirdiSTa kAlAyAM tad eva saMkhyAya bandhaM ca dadyAt ॥
hk transliteration by Sanscript