Keyword Analysis & Research: when did knob and tube wiring end

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when did knob and tube wiring end	1.27	0.4	7287	87	33
when	1.87	0.4	4226	70	4
did	0.3	0.9	6091	4	3
knob	0.79	0.2	9877	86	4
and	0.76	0.4	6730	53	3
tube	1.82	0.2	7112	41	4
wiring	1.39	1	8069	1	6
end	0.85	0.8	480	16	3

Keyword	CPC	PCC	Volume	Score
when did knob and tube wiring end	0.02	0.2	6097	84