Keyword Analysis & Research: when was the magnetic compass invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was the magnetic compass invented	0.93	1	8713	25	38
when	1.51	0.1	1489	99	4
was	0.11	0.1	8114	81	3
the	1.79	0.8	5637	65	3
magnetic	0.52	0.9	6344	50	8
compass	1.19	0.1	2783	4	7
invented	1.04	0.8	1839	35	8

Keyword	CPC	PCC	Volume	Score
when was the magnetic compass invented	0.39	1	3615	5
who invented the magnetic compass	0.4	0.9	2100	94
where was the magnetic compass invented	0.24	0.1	5417	15
magnetic compass invented	1.54	0.3	6160	93
why was the magnetic compass invented	0.81	0.8	6919	97
who invented the first magnetic compass	0.06	0.2	5831	96
who invented the magnetic compass in china	0.07	0.4	6444	44