Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Calendar, Muhurta Elements
कालमानं मुहूर्ताङ्गानि च
हेमलंबो विलंबश्च विकारी शार्वरी लवः ।शुभकृच्छोभनः क्रोधी विश्वावसुपराभवौ ॥ ११८ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 118.
Hemalamba, Vilamba, Vikari, Sharvari, Lava. Shubhakrit, Shobhana, Krodhi, Vishvavasu and Parabhava.
Simple meaning: These are the next ten names of the sixty-year cycle.
प्लवंगः कीलकः सौम्यः सामातश्च विरोधकृत् ।
These are the next ten names of the sixty-year cycle.
पिंगलः कालयुक्तश्च सिद्धार्थो रौद्रदुर्मतीः ।
These are the last ten names of the sixty-year cycle.
नामतुल्यफलाः सर्वे विज्ञेयाः षष्टिवत्सराः ।
Each of the sixty years gives results like its name. Five years make a cycle, so there are twelve cycles.