Keyword Analysis & Research: when did chemical warfare start

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when did chemical warfare start	1.46	0.8	613	26	31
when	0.32	0.1	9972	77	4
did	0.43	1	7808	8	3
chemical	1.9	0.3	9849	54	8
warfare	1.32	0.2	8949	60	7
start	0.72	0.2	5911	3	5

Keyword	CPC	PCC	Volume	Score
when did chemical warfare start	1.6	0.7	4134	26