| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| what class is theophylline | 0.85 | 0.3 | 987 | 32 | 26 |
| what | 1.67 | 0.9 | 5517 | 92 | 4 |
| class | 0.66 | 0.4 | 614 | 92 | 5 |
| is | 0.76 | 1 | 5150 | 56 | 2 |
| theophylline | 0.1 | 0.4 | 9695 | 53 | 12 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| what class is theophylline | 0.65 | 0.6 | 3313 | 8 |
