| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| how was submarines used in ww1 | 0.66 | 0.1 | 9790 | 91 | 30 |
| how | 1.07 | 0.2 | 1570 | 15 | 3 |
| was | 1.92 | 0.3 | 8931 | 39 | 3 |
| submarines | 1.33 | 1 | 759 | 3 | 10 |
| used | 0.86 | 1 | 1087 | 47 | 4 |
| in | 1.28 | 0.4 | 5935 | 41 | 2 |
| ww1 | 0.88 | 1 | 8069 | 86 | 3 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| how was submarines used in ww1 | 1.6 | 0.8 | 8315 | 78 |
| how were submarines used in ww1 | 1.01 | 0.7 | 3530 | 93 |
| what were submarines used for in ww1 | 1.02 | 0.8 | 8526 | 57 |
| who used submarines in ww1 | 1.37 | 0.2 | 3947 | 12 |
| submarines used in ww1 | 1.64 | 1 | 8079 | 7 |
| why were submarines used in ww1 | 0.64 | 1 | 9814 | 99 |
| when were submarines first used in ww1 | 0.34 | 0.7 | 3446 | 13 |
| weapons used by submarines ww1 | 0.38 | 0.5 | 3843 | 56 |
| how were submarines used in ww2 | 1.82 | 0.9 | 6501 | 88 |
| were tanks and submarines widely used in ww1 | 0.8 | 0.3 | 2628 | 72 |
| when were submarines used in ww1 | 1.05 | 0.6 | 3838 | 45 |
