when was chemical gas used in ww1

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was chemical gas used in ww1	0.67	0.8	1329	23	33
when	0.54	0.2	6305	90	4
was	1.17	0.4	3018	97	3
chemical	1.1	1	6274	49	8
gas	0.73	0.7	1775	10	3
used	1.61	0.4	5123	93	4
in	1.19	0.4	4800	35	2
ww1	1.13	1	1175	20	3

Keyword	CPC	PCC	Volume	Score
when was chemical gas used in ww1	0.86	0.3	6976	85
when was gas used in ww1	1.6	0.7	8927	29
what chemical gases were used in ww1	1.23	0.2	3756	83
when was gas introduced in ww1	1.51	0.4	3232	76
types of gas used in ww1	0.51	0.3	8698	58
how was poison gas used in ww1	1.49	0.9	2144	90
when was poison gas first used in ww1	0.17	0.3	8635	60
gas used in ww1	1.76	0.7	202	23
how was mustard gas used in ww1	1.42	1	7811	11
when was gas first used in ww1	1.75	0.4	638	38
when was chlorine gas first used in ww1	0.98	0.5	4257	90
how was gas used in ww1	0.52	0.7	4520	62
how was chlorine gas used in ww1	0.38	1	5588	51