| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| how long have humans been at war | 1.7 | 0.7 | 810 | 3 |
| how long have we been at war | 1.19 | 0.9 | 6549 | 21 |
| how much of human history is war | 1.79 | 0.8 | 3436 | 61 |
| war in human history | 0.06 | 0.1 | 8394 | 92 |
| how long have there been humans | 1.68 | 0.4 | 8602 | 28 |
| how many humans have died in wars | 1.11 | 1 | 9553 | 14 |
| how long has war existed | 0.86 | 0.6 | 4078 | 99 |
| humans have been around for how long | 0.3 | 0.9 | 8066 | 4 |
| how many war have we had | 0.57 | 0.2 | 4662 | 27 |
| how many people went to war | 0.59 | 0.7 | 2694 | 60 |
| human population before world war 1 | 1.46 | 0.3 | 7799 | 57 |
