दिवसानुवृत्तो नित्यः ॥ कZ_०२.६.२४ ॥
divasānuvṛtto nityaḥ
যা দিন-দিন ধরে চলতে থাকে, সেটাই নিত্য (আবর্ত) আয়।
It provides a simple operational test for classifying receipts as routine cashflow versus periodic or exceptional receipts.