| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| penicillin discovery 1933 | 0.5 | 1 | 6951 | 37 | 25 |
| penicillin | 1.78 | 0.3 | 4145 | 44 | 10 |
| discovery | 1.86 | 0.6 | 1448 | 20 | 9 |
| 1933 | 0.55 | 0.6 | 6046 | 8 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| penicillin discovery 1933 | 0.28 | 0.3 | 6440 | 55 |
| penicillin discovery 1928 | 0.9 | 0.7 | 1371 | 42 |
| penicillin discovery 1920 | 0.45 | 0.4 | 3372 | 24 |
