when was gridiron football invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was gridiron football invented	0.34	0.2	4537	69	35
when	0.03	0.3	9337	28	4
was	0.93	0.2	6020	81	3
gridiron	1.86	1	3392	50	8
football	1.54	0.6	6252	93	8
invented	1.34	0.4	2317	81	8

Keyword	CPC	PCC	Volume	Score
when was gridiron football invented	0.61	0.5	391	83
he basically invented gridiron football	1.77	0.1	9159	35
where was gridiron football invented	0.95	0.9	7867	3
who invented gridiron football	1.62	0.8	7047	59
when was gridiron invented	1.04	0.4	2194	98
why is it called gridiron football	1.09	0.5	5958	86
why is football called gridiron	0.37	0.5	444	19
why is american football called gridiron	1.63	0.3	6909	7
origin of the term gridiron	1.52	0.8	1912	47
why is football field called gridiron	0.95	0.2	2209	48
what is gridiron football	1.16	0.7	9835	71
where did the term gridiron come from	0.13	0.8	9174	45
gridiron football video game	1.88	0.2	7069	61
who invented the game football	1.9	0.2	8640	82
why is it called the gridiron	1.24	0.2	837	43
ball gridiron football wikipedia	1.12	0.3	8622	96
gridiron definition football definition	0.56	0.7	4648	45