when was the columbian exchange

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was the columbian exchange	1.75	0.6	2220	80	31
when	1.19	0.6	237	50	4
was	0.96	0.7	5047	21	3
the	0.48	0.1	9844	66	3
columbian	1.99	0.4	420	71	9
exchange	1.86	0.1	2421	25	8

Keyword	CPC	PCC	Volume	Score
when was the columbian exchange	1.81	0.2	2238	22
when was the columbian exchange started	1.76	0.4	4904	57
when was the columbian exchange end	1.04	0.8	7194	16
when was the columbian exchange created	0.77	0.3	4912	28
when was the columbian exchange date	0.57	0.5	9128	48
what was the columbian exchange	0.78	0.1	57	95
the columbian exchange	0.12	0.9	5942	80
columbian exchange definition	0.8	0.2	4273	39
what is the columbian exchange	0.08	0.3	6526	86
columbian exchange map	1.88	0.9	3003	99
when did the columbian exchange start	1.3	0.7	9358	33
define columbian exchange	0.07	0.3	3426	56