how were chemical weapons used in ww1

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
how were chemical weapons used in ww1	0.09	0.5	7929	15	37
how	0.4	0.5	8534	29	3
were	0.1	0.4	1759	9	4
chemical	1.76	0.5	1128	37	8
weapons	1.03	0.8	5906	47	7
used	0.63	0.6	5755	28	4
in	1.23	0.3	4803	12	2
ww1	1.77	0.2	2777	47	3

Keyword	CPC	PCC	Volume	Score
how were chemical weapons used in ww1	1.96	1	6113	39
what chemical weapons were used in ww1	1.35	0.3	2492	64
why were chemical weapons used in ww1	1.65	0.7	2388	7
when were chemical weapons first used in ww1	1.56	0.1	3866	48
were chemical weapons used in ww2	1.31	0.3	3301	67
what country used chemical weapons in ww1	1.94	0.6	8835	51
how effective were chemical weapons in ww1	0.29	0.5	1724	7
chemical weapons used in wwi	0.71	0.9	3319	15
what chemical warfare was used in ww1	0.14	0.3	5598	30
what chemical weapons were used in ww2	0.72	0.9	6663	29
what chemicals were used in ww1	1.5	0.4	1521	20
the use of chemical weapons in ww1	0.94	0.8	8645	73
chemical warfare weapons in ww1	1.02	0.8	7786	26
chemical weapons in wwi	0.24	1	9853	86