| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | in 1991 | 2101 |
|
| 2 | of 1991 | 530 |
|
| 3 | for 1991 | 286 |
|
| 4 | during 1991 | 128 |
|
| 5 | to 1991 | 75 |
|
| 6 | by 1991 | 63 |
|
| 7 | on 1991 | 53 |
|
| 8 | since 1991 | 49 |
|
| 9 | from 1991 | 40 |
|
| 10 | until 1991 | 32 |
|
| 11 | between 1991 | 19 |
|
| 12 | with 1991 | 14 |
|
| 13 | throughout 1991 | 13 |
|
| 14 | at 1991 | 10 |
|
| 15 | before 1991 | 9 |
|
| 16 | into 1991 | 7 |
|
| 17 | against 1991 | 5 |
|
| 18 | after 1991 | 5 |
|
