| force | 0.25 |
| call western calendar | 0.32 |
| improve the approximati… | 0.32 |
| call christian calendar | 0.25 |
| take effect | 0.25 |
| add additional days | 0.25 |
| adjust for the mismatch | 0.25 |
| same months | 0.25 |
| a leap year | 0.25 |
| accurate | 0.56 |
| solar calendar | 0.51 |
| the calendar | 0.45 |
| the most widely used ca… | 0.23 |
| adopted | 0.68 |
| introduced | 0.66 |
| introduced by pope greg… | 0.45 |
| accepted after the octo… | 0.37 |
| designed to keep on ver… | 0.25 |