Keyword Analysis & Research: when was the lie detector invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was the lie detector invented	1.62	0.1	9174	46	34
when	0.59	0.6	3555	44	4
was	1.87	0.2	1895	88	3
the	1.39	0.6	4070	41	3
lie	1.61	0.9	3857	80	3
detector	1.84	0.5	2018	71	8
invented	0.59	0.6	547	65	8

Keyword	CPC	PCC	Volume	Score
when was the lie detector invented	1.03	0.8	7031	56
who invented the lie detector	1.24	0.1	8066	29
who invented the lie detector test	0.8	0.4	2087	50
when was the first lie detector invented	1.29	0.2	8112	38
when were lie detector invented	1.93	1	5811	99
who invented the lie detector machine	0.18	0.7	6910	28
lie detector invented	0.57	0.7	7740	53