what gas did the russian sleep experiment use

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what gas did the russian sleep experiment use	0.15	1	3458	78	45
what	1.26	0.5	9424	38	4
gas	0.3	0.6	6864	3	3
did	1.62	0.6	5461	10	3
the	0.32	0.7	9995	33	3
russian	0.24	0.5	1430	20	7
sleep	1.79	0.9	6835	79	5
experiment	0.22	0.7	6930	69	10
use	0.25	0.4	5161	10	3

Keyword	CPC	PCC	Volume	Score
what gas did the russian sleep experiment use	1.07	0.1	245	91
gas used in russian sleep experiment	0.94	0.4	5863	46
russian sleep experiment gas	1.73	0.3	6534	65
what did the russian sleep experiment do	0.05	0.5	9228	96
what happened in the russian sleep experiment	0.28	0.5	2138	19
what was the russian sleep experiment real	1.31	0.5	7789	40
what is the russian experiment sleep	0.37	0.2	2467	76
what's the russian sleep experiment	0.49	0.1	4748	95
russian sleep experiment gas masks	1.85	0.7	7938	51
why did the russian sleep experiment happen	1.01	0.9	113	49
the russian sleep experiment explained	0.27	0.3	1798	86
the russian sleep experiment video	0.2	0.2	1435	100
russian science experiment on sleep	0.42	0.5	9294	68
the russian sleeping experiment	1.98	0.2	9297	20
russian sleep experiment original	1.3	0.2	7838	45
russian sleep experiment facts	1.18	0.8	2744	20