Keyword Analysis & Research: when did nullification start

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when did nullification start	0.19	0.3	6447	37	28
when	0.21	1	9445	50	4
did	0.77	0.6	7226	6	3
nullification	1.78	0.5	8436	32	13
start	0.96	0.9	9802	99	5

Keyword	CPC	PCC	Volume	Score
when did nullification start	0.13	0.4	9862	89
what started the nullification crisis	0.72	1	7207	83
how did the nullification crisis start	1.99	0.9	3548	50
who started the nullification crisis	1.23	0.8	4900	96
nullification crisis starts	0.9	0.9	6967	29
when did the nullification crisis start	0.98	0.8	186	68
what year did nullification start	1.75	0.3	8002	86
why did the nullification crisis start	1.05	0.5	9460	5