when was the magnetic compass created

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was the magnetic compass created	0.02	0.4	6721	10	37
when	0.85	0.5	1340	57	4
was	1.32	0.4	3179	51	3
the	1.52	0.2	6365	11	3
magnetic	1.9	0.5	3010	22	8
compass	0.67	0.6	9834	10	7
created	1.94	0.2	4042	49	7

Keyword	CPC	PCC	Volume	Score
when was the magnetic compass created	0.42	1	5109	53
who created the magnetic compass	1.03	0.2	2317	31
who created the magnetic compass in china	1.25	0.8	6360	77
who created the first magnetic compass	0.37	0.5	6090	93
who created the magnetic compass renaissance	1.37	0.6	1180	39
why was the magnetic compass created	1.13	0.1	1874	14
invention of the magnetic compass	1.81	0.2	8782	67
what country invented the magnetic compass	0.6	0.4	1681	50
magnetic compass definition history	1.81	0.7	4839	73
who used the magnetic compass	0.42	0.5	190	73
when was the magnetic compass made	1.27	0.7	6646	99
magnetic compass date of invention	0.03	0.2	1822	86