Keyword Analysis & Research: when were masks first used

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when were masks first used	0.59	0.5	9245	57	26
when	0.55	0.8	9714	60	4
were	1.49	0.7	3161	89	4
masks	1.46	0.2	5686	55	5
first	0.52	0.3	6892	56	5
used	0.91	0.6	449	54	4

Keyword	CPC	PCC	Volume	Score
when were masks first used	1.66	1	2076	93