Keyword Analysis & Research: when were hard hats invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when were hard hats invented	0.41	0.3	9204	65	28
when	1.58	0.6	8658	68	4
were	1.54	0.3	6627	78	4
hard	0.68	0.2	6301	45	4
hats	0.47	0.9	188	28	4
invented	0.45	0.4	8327	50	8

Keyword	CPC	PCC	Volume	Score
when were hard hats invented	0.03	0.2	1001	50