Time-wheel- A wheel of time measuring 20 koṭikoṭi Sāgaropama (=20xl07xl07 Sāgaropamas).
It is divided into two divisions- Avasarpiṇī (descending half of the time-wheel) and Utsarpiṇī (ascending half of the time-wheel), each of which consists of six spokes.
kālacakraṃ viṃśatisāgaropamakoṭākoṭi parimāṇaṃ...
(NandīHāVṛ p. 84)
kālacakraṃ viṃśatikoṭākoṭipramāṇaṃ...
(NandiMaVṛ Pa 196)