| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] eighteen months | 159 |
|
| 2 | [prep] eighteen months | 159 |
|
| 3 | [adj] eighteen months | 96 |
|
| 4 | [adv] eighteen months | 68 |
|
| 5 | [adv] eighteen months | 67 |
|
| 6 | [num ord] eighteen months | 61 |
|
| 7 | for eighteen months | 58 |
|
| 8 | for eighteen months | 58 |
|
| 9 | [conj] eighteen months | 34 |
|
| 10 | last eighteen months | 32 |
|
| 11 | last eighteen months | 32 |
|
| 12 | about eighteen months | 31 |
|
| 13 | about eighteen months | 31 |
|
| 14 | [verb] eighteen months | 28 |
|
| 15 | to eighteen months | 27 |
|
| 16 | to eighteen months | 27 |
|
| 17 | [art] eighteen months | 22 |
|
| 18 | of eighteen months | 22 |
|
| 19 | [noun] eighteen months | 22 |
|
| 20 | of eighteen months | 22 |
|
| 21 | [art] eighteen months | 22 |
|
| 22 | [adj] eighteen months | 19 |
|
| 23 | the eighteen months | 19 |
|
| 24 | the eighteen months | 19 |
|
| 25 | [coord] eighteen months | 17 |
|
| 26 | next eighteen months | 17 |
|
| 27 | next eighteen months | 17 |
|
| 28 | [subord] eighteen months | 16 |
|
| 29 | [noun sg] eighteen months | 16 |
|
| 30 | [det] eighteen months | 15 |
|
