| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | astronomical calendar | Mayan civilization | Highly sophisticated, used for tracking celestial cycles and predicting eclipses and other astronomical phenomena | 1 |
| 2 | astronomical calendars | Mayan civilization | Used for religious ceremonies, agricultural planning, and predicting celestial events | 1 |
| 3 | calendar | Maya civilization | Developed a sophisticated calendar system with multiple cycles and used for various religious and agricultural purposes | 1 |
| 4 | calendars | Mayan civilization | Highly advanced, with multiple systems for different purposes like religious ceremonies, agricultural cycles, and historical events | 1 |