when was poison invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was poison invented	0.83	0.3	6048	25	24
when	1.07	0.9	7291	30	4
was	0.59	0.5	206	50	3
poison	0.19	0.1	2190	45	6
invented	1.14	0.5	1785	42	8

Keyword	CPC	PCC	Volume	Score
when was poison invented	0.99	1	4444	14
who invented poison gas	0.86	1	7530	93
when was poison gas invented	1.8	0.4	9981	46
who invented poison gas in ww1	1.36	0.8	9426	71
when was rat poison invented	0.38	0.9	9270	71
when was poison gas invented ww1	1.15	0.8	3294	27
when was poison gas first invented	0.43	1	4895	69
what year was poison gas invented	1.59	0.7	9028	43
where was poison gas invented	0.02	0.3	6484	50
why was poison gas invented	0.86	1	8640	9