| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a long spell | 11 |
|
| 2 | [prep] a long spell | 11 |
|
| 3 | for a long spell | 5 |
|
| 4 | for a long spell | 5 |
|
| 5 | a long spell [prep] | 12 |
|
| 6 | a long spell [prep] | 12 |
|
| 7 | a long spell of | 7 |
|
| 8 | a long spell of | 7 |
|
