| Sites | Very frequent (%) | Frequent (%) | Rare (%) |
| K1 | 12.96 | 38.88 | 48.14 |
| K2 | 06.45 | 35.48 | 58.06 |
| K3 | 08.33 | 38.88 | 52.77 |
| K4 | 06.25 | 21.87 | 71.87 |