| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| amphibians respiratory system vs birds | 1.31 | 0.9 | 2520 | 100 | 38 |
| amphibians | 0.33 | 0.3 | 7200 | 44 | 10 |
| respiratory | 1.21 | 0.6 | 4363 | 57 | 11 |
| system | 0.09 | 0.1 | 3881 | 80 | 6 |
| vs | 1.28 | 0.8 | 7076 | 23 | 2 |
| birds | 0.45 | 0.9 | 3798 | 100 | 5 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| amphibians respiratory system vs birds | 1.15 | 0.1 | 6427 | 81 |
