Keyword Analysis & Research: why is it called chekhov's gun

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why is it called chekhov's gun	0.23	0.7	4662	12	30
why	0.61	0.5	5059	64	3
is	1.64	0.3	548	23	2
it	0.76	0.1	4740	34	2
called	0.01	0.6	1273	73	6
chekhov's	1.1	0.8	6076	96	9
gun	1.5	0.4	6030	32	3

Keyword	CPC	PCC	Volume	Score
why is it called chekhov's gun	1.2	0.9	9057	95