| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| how long has human history been recorded | 0.02 | 0.5 | 3389 | 73 |
| how long has human history been | 0.98 | 0.7 | 3588 | 50 |
| how old is recorded human history | 1.61 | 0.5 | 3593 | 4 |
| beginning of recorded human history | 1.03 | 0.8 | 6352 | 34 |
| first recorded year in human history | 0.79 | 1 | 606 | 77 |
| recorded human history timeline | 1.43 | 0.9 | 5975 | 25 |
| first record of human history | 1.12 | 0.7 | 4700 | 51 |
| earliest human recorded history | 1.17 | 0.8 | 6848 | 17 |
| when did humans start recording history | 1.55 | 0.1 | 8561 | 34 |
| earliest record of humans | 1.25 | 0.6 | 2942 | 6 |
