when did the designated hitter rule begin

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when did the designated hitter rule begin	1.83	0.6	9071	78	41
when	0.37	0.5	7077	51	4
did	1.15	0.5	7119	48	3
the	1.47	1	8835	61	3
designated	1.96	0.2	2047	93	10
hitter	1.11	0.3	181	67	6
rule	1.11	0.8	7266	59	4
begin	0.11	0.5	4650	28	5

Keyword	CPC	PCC	Volume	Score
when did the designated hitter rule begin	1.16	0.4	105	22
when did designated hitter begin	1.1	0.9	6037	70
when did the designated hitter start	0.92	0.5	3216	49
when was the designated hitter introduced	0.45	0.3	1699	88
what year did the designated hitter start	0.5	0.7	3057	28
when was designated hitter started	1.51	0.9	9745	31
what is the designated hitter rule	1.33	0.6	6002	50
first year of designated hitter	1.42	0.1	5179	94
who was the first designated hitter	1.13	0.5	6287	43
mlb designated hitter rule	0.84	0.8	273	80
national league designated hitter rule	0.82	0.2	7416	23
american league designated hitter rule	0.63	0.7	5664	82
baseball designated hitter rule	0.24	1	4607	15
mlb designated hitter rule national league	1.84	0.3	8355	50
world series designated hitter rule	1.06	0.3	7092	83
nfhs designated hitter rule	1.37	0.6	3005	73
mlb designated hitter rule change	1.75	0.3	3020	47
first designated hitter in mlb	1.12	0.2	7224	21
first designated hitter in baseball	0.02	0.4	3554	32