Laghukoshasamgraha 12.9

12.9

āhnikaṃ syātpunaraharnivṛtye nityakarmaṇi |
bhojane granthabhāge cā''ḍhakaḥ prasthacatuṣṭayam ||

āhnika is used for diurnal [acts], daily rites,
a meal, and a chapter of a book; āḍhaka is a measure of four prasthas;