| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | were used [prep] a | 59 |
|
| 2 | were used [prep] a | 51 |
|
| 3 | were used as a | 20 |
|
| 4 | were used in a | 20 |
|
| 5 | were used in a | 20 |
|
| 6 | were used as a | 20 |
|
| 7 | were used [prep] an | 8 |
|
| 8 | were used for a | 6 |
|
| 9 | were used at a | 6 |
|
| 10 | were used at a | 6 |
|
| 11 | were used for a | 6 |
|
