Keyword Analysis & Research: when did we start using gregorian calendar

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when did we start using gregorian calendar	0.81	0.7	7794	19	42
when	0.34	0.1	7361	33	4
did	0.47	0.1	7002	66	3
we	0.06	1	8153	69	2
start	1	0.7	229	42	5
using	1.42	0.5	6109	86	5
gregorian	0.22	0.3	1283	35	9
calendar	1.22	0.4	7257	79	8

Keyword	CPC	PCC	Volume	Score
when did we start using gregorian calendar	1.16	1	5480	32