when was the upright piano invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was the upright piano invented	1.55	0.7	628	72	35
when	0.04	0.2	4136	63	4
was	1.81	0.6	6088	46	3
the	0.6	0.6	4635	50	3
upright	1.39	0.9	6637	47	7
piano	0.3	0.4	4830	81	5
invented	0.96	0.3	474	54	8

Keyword	CPC	PCC	Volume	Score
when was the upright piano invented	1.78	0.2	3335	82
when was invented the piano	0.48	1	4727	57
when was the 1st piano invented	1.05	0.6	6924	4
what year was the piano invented	1.33	0.4	4454	8
vintage upright piano for sale	1.28	0.7	8157	32
who invented the piano	0.81	0.8	3908	94
when was the first piano invented	1.21	1	1346	29
when was the piano invented what year	1.91	0.3	6046	69
how was the piano invented	0.05	0.1	7306	72
piano invented year	1.21	0.9	3710	80
in which country was the piano invented	0.59	0.3	9292	64
when was the modern piano invented	0.39	0.8	8193	73