| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] to the 15th | 7 |
|
| 2 | back to the 15th | 5 |
|
| 3 | [adv prt] to the 15th | 5 |
|
| 4 | back to the 15th | 5 |
|
| 5 | [noun] to the 15th | 5 |
|
| 6 | to the 15th [noun] | 13 |
|
| 7 | to the 15th [noun sg] | 11 |
|
| 8 | to the 15th century | 8 |
|
| 9 | to the 15th century | 8 |
|
