| today in cannabis history | 0.61 | 0.9 | 6225 | 25 | 60 |
| this day in cannabis history | 0.37 | 0.6 | 1036 | 28 | 93 |
| history of cannabis in america | 0.48 | 1 | 3160 | 30 | 30 |
| history of cannabis in the united states | 1.03 | 0.5 | 7149 | 40 | 6 |
| cannabis use in history | 1.49 | 0.3 | 6964 | 23 | 45 |
| history of cannabis timeline | 1.58 | 0.2 | 983 | 28 | 100 |
| cannabis history of origin and use | 1.76 | 0.6 | 9243 | 34 | 38 |
| when was cannabis found | 1.13 | 0.1 | 6280 | 23 | 43 |
| ancient history of cannabis | 0.37 | 0.7 | 228 | 27 | 25 |
| true history of marijuana | 1.02 | 0.2 | 8375 | 25 | 19 |
| the history of marijuana | 1.79 | 0.9 | 2576 | 24 | 55 |
| how long has cannabis been around | 1.07 | 0.1 | 3749 | 33 | 94 |
| when did cannabis originate | 0.37 | 0.5 | 481 | 27 | 47 |
| when was cannabis first used | 0.77 | 0.6 | 4027 | 28 | 4 |
