| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't [verb] | 12359 |
|
| 2 | could n't [vb infin] | 12348 |
|
| 3 | [modal v] n't find | 966 |
|
| 4 | could [adv] find | 667 |
|
| 5 | could not find | 510 |
|
| 6 | could [not/n't] find | 510 |
|
| 7 | could n't find | 382 |
|
