| Count | Prefix |
|---|---|
| 8 | fel- |
| 9 | fel. |
| 2 | fel2 |
| 2 | fel3 |
| 1 | fel8 |
| 107 | fela |
| 63 | felb |
| 81 | felc |
| 738 | feld |
| 92 | fele |
| 20 | felf |
| 105 | felg |
| 12 | felh |
| 2,642 | feli |
| 5 | felj |
| 44 | felk |
| 1,069 | fell |
| 40 | felm |
| 15 | feln |
| 122 | felo |
| 31 | felp |
| 1 | felq |
| 6 | felr |
| 230 | fels |
| 453 | felt |
| 32 | felu |
| 18 | felv |
| 11 | felw |
| 4 | felx |
| 15 | fely |
| 16 | felz |